AnimateWindow API

Hi all,

I'm trying to animate a splash screen form using the API function
AnimateWindow as shown below:

Sub Main()
Dim aFrm As New frmSpash
Load aFrm
aFrm.Move (Screen.Width - aFrm.Width) / 2, (Screen.Height - aFrm.Height) /
2
Call AnimateWindow(aFrm.hwnd, AW_DURATION_DEFAULT, AW_CENTER Or
AW_VER_POSITIVE)
aFrm.Show '-- although calling this has no affect because the form shows
afrer the _
previous line of code
aFrm.Refresh
End Sub

Private Sub Form_Unload(Cancel As Integer)
Call AnimateWindow(Me.hwnd, AW_DURATION_DEFAULT, AW_HIDE Or AW_CENTER)
Refresh
End Sub

Here are the declares:
Public Const AW_HOR_POSITIVE = &H1
Public Const AW_HOR_NEGATIVE = &H2
Public Const AW_VER_POSITIVE = &H4
Public Const AW_VER_NEGATIVE = &H8
Public Const AW_CENTER = &H10
Public Const AW_HIDE = &H10000
Public Const AW_ACTIVATE = &H20000
Public Const AW_SLIDE = &H40000
Public Const AW_BLEND = &H80000
Public Const AW_DURATION_DEFAULT = 200
Public Declare Function AnimateWindow Lib "user32" (ByVal hwnd As Long, _

ByVal dwTime As Long, _

ByVal dwFlags As Long) As Long

Although the animation itself works there are two things that look very
unprofessional:
1. During the animation the from's background looks like an abstract art
painting.
2. I can only animate forms whose BorderStyle is other that 0 (and that's
the style you usually need for a splash screen)

Has any of you have a solution to those issues?

Thanks in advance

Tim

You need to handle the WM_PRINTCLIENT message to do this properly, and even
then there are problems depending on what controls you have on the form. The
following sites have samples that might help you:

http://www.domaindlx.com/e_morcillo/
http://www.vbthunder.com/

--
Kevin Westhead

"Tim Manos" <timmanos@t-online.de> wrote in message
news:3bc057d3$1@news.devx.com...
> Although the animation itself works there are two things that look very
> unprofessional:
> 1. During the animation the from's background looks like an abstract
art
> painting.
> 2. I can only animate forms whose BorderStyle is other that 0 (and
that's
> the style you usually need for a splash screen)
>
> Has any of you have a solution to those issues?
>
> Thanks in advance
>
> Tim

You need to handle the WM_PRINTCLIENT message to do this properly, and even
then there are problems depending on what controls you have on the form. The
following sites have samples that might help you:

http://www.domaindlx.com/e_morcillo/
http://www.vbthunder.com/

--
Kevin Westhead

"Tim Manos" <timmanos@t-online.de> wrote in message
news:3bc057d3$1@news.devx.com...
> Although the animation itself works there are two things that look very
> unprofessional:
> 1. During the animation the from's background looks like an abstract
art
> painting.
> 2. I can only animate forms whose BorderStyle is other that 0 (and
that's
> the style you usually need for a splash screen)
>
> Has any of you have a solution to those issues?
>
> Thanks in advance
>
> Tim

You can try this bit of code..
It helped me get over that Artwork while the forms is loading....

''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'''''''''''''''''''''''''''''
Const GWL_WNDPROC = (-4)

Private Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA"
( _
ByVal hWnd As Long, _
ByVal nIndex As Long) As Long
Private Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA"
( _
ByVal hWnd As Long, _
ByVal nIndex As Long, _
ByVal dwNewLong As Long) As Long

Const PROP_PREVPROC = "PrevProc"
Const PROP_FORM = "FormObject"

Private Declare Function SetProp Lib "user32" Alias "SetPropA" ( _
ByVal hWnd As Long, _
ByVal lpString As String, _
ByVal hData As Long) As Long
Private Declare Function GetProp Lib "user32" Alias "GetPropA" ( _
ByVal hWnd As Long, _
ByVal lpString As String) As Long
Private Declare Function RemoveProp Lib "user32" Alias "RemovePropA" ( _
ByVal hWnd As Long, _
ByVal lpString As String) As Long

Private Declare Sub MoveMemory Lib "kernel32" Alias "RtlMoveMemory" ( _
Dest As Any, _
Src As Any, _
ByVal DestL As Long)

Const WM_PRINTCLIENT = &H318

Private Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End Type

Private Declare Function GetClientRect Lib "user32" ( _
ByVal hWnd As Long, _
lpRect As RECT) As Long

Private Declare Function apiOleTranslateColor Lib "oleaut32" Alias
"OleTranslateColor" ( _
ByVal lOleColor As Long, _
ByVal lHPalette As Long, _
lColorRef As Long) As Long

Enum AnimateWindowFlags
AW_HOR_POSITIVE = &H1
AW_HOR_NEGATIVE = &H2
AW_VER_POSITIVE = &H4
AW_VER_NEGATIVE = &H8
AW_CENTER = &H10
AW_HIDE = &H10000
AW_ACTIVATE = &H20000
AW_SLIDE = &H40000
AW_BLEND = &H80000
End Enum

Private Declare Function apiAnimateWindow Lib "user32" Alias "AnimateWindow"
( _
ByVal hWnd As Long, _
ByVal dwTime As Long, _
ByVal dwFlags As Long) As Long

Private Declare Function MulDiv Lib "kernel32" ( _
ByVal Mul As Long, _
ByVal Nom As Long, _
ByVal Den As Long) As Long

Private Declare Function CreateSolidBrush Lib "gdi32" ( _
ByVal crColor As Long) As Long
Private Declare Function BitBlt Lib "gdi32" ( _
ByVal hDestDC As Long, _
ByVal x As Long, _
ByVal y As Long, _
ByVal nWidth As Long, _
ByVal nHeight As Long, _
ByVal hSrcDC As Long, _
ByVal xSrc As Long, _
ByVal ySrc As Long, _
ByVal dwRop As Long) As Long

Private Declare Function GetDC Lib "user32" ( _
ByVal hWnd As Long) As Long
Private Declare Function CreateCompatibleDC Lib "gdi32" ( _
ByVal hDC As Long) As Long
Private Declare Function ReleaseDC Lib "user32" ( _
ByVal hWnd As Long, _
ByVal hDC As Long) As Long
Private Declare Function DeleteDC Lib "gdi32" ( _
ByVal hDC As Long) As Long
Private Declare Function FillRect Lib "user32" ( _
ByVal hDC As Long, _
lpRect As RECT, _
ByVal hBrush As Long) As Long
Private Declare Function DeleteObject Lib "gdi32" ( _
ByVal hObject As Long) As Long
Private Declare Function SelectObject Lib "gdi32" ( _
ByVal hDC As Long, _
ByVal hObject As Long) As Long

Private Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA"
( _
ByVal lpPrevWndFunc As Long, _
ByVal hWnd As Long, _
ByVal Msg As Long, _
ByVal wParam As Long, _
ByVal lParam As Long) As Long

'
' AnimateWindow
'
' Wrapper for AnimateWindow api
'
Public Sub AnimateWindow( _
ByVal Form As Form, _
ByVal dwTime As Long, _
ByVal dwFlags As AnimateWindowFlags)

' Set the properties
SetProp Form.hWnd, PROP_PREVPROC, GetWindowLong(Form.hWnd, GWL_WNDPROC)
SetProp Form.hWnd, PROP_FORM, ObjPtr(Form)

' Subclass the window
SetWindowLong Form.hWnd, GWL_WNDPROC, AddressOf AnimateWinProc

' Call AnimateWindow API
apiAnimateWindow Form.hWnd, dwTime, dwFlags

' Unsubclass the window
SetWindowLong Form.hWnd, GWL_WNDPROC, GetProp(Form.hWnd, PROP_PREVPROC)

' Remove the properties
RemoveProp Form.hWnd, PROP_FORM
RemoveProp Form.hWnd, PROP_PREVPROC

' Refresh the form
'Form.Refresh

End Sub

'
' AnimateWinProc
'
' Window procedure for AnimateWindow
'
Private Function AnimateWinProc( _
ByVal hWnd As Long, _
ByVal Msg As Long, _
ByVal wParam As Long, _
ByVal lParam As Long) As Long

Dim lPrevProc As Long
Dim lForm As Long
Dim oForm As Form

' Get the previous WinProc pointer
lPrevProc = GetProp(hWnd, PROP_PREVPROC)

' Get the form object
lForm = GetProp(hWnd, PROP_FORM)
MoveMemory oForm, lForm, 4&

Select Case Msg

Case WM_PRINTCLIENT
Dim tRect As RECT
Dim hBr As Long

' Get the window client size
GetClientRect hWnd, tRect

' Create a brush with the
' form background color
hBr = CreateSolidBrush(OleTranslateColor(oForm.BackColor))

' Fill the DC with the
' background color
FillRect wParam, tRect, hBr

' Delete the brush
DeleteObject hBr

If Not oForm.Picture Is Nothing Then
Dim lScrDC As Long
Dim lMemDC As Long
Dim lPrevBMP As Long

' Create a compatible DC
lScrDC = GetDC(0&)
lMemDC = CreateCompatibleDC(lScrDC)
ReleaseDC 0, lScrDC

' Select the form picture in the DC
lPrevBMP = SelectObject(lMemDC, oForm.Picture.Handle)

' Draw the picture in the DC
BitBlt wParam, _
0, 0, _
HM2Pix(oForm.Picture.Width), HM2Pix(oForm.Picture.Height), _
lMemDC, 0, 0, vbSrcCopy

' Release the picture
SelectObject lMemDC, lPrevBMP

' Delete the DC
DeleteDC lMemDC

End If

End Select

' Release the form object
MoveMemory oForm, 0&, 4&

' Call the original window procedure
AnimateWinProc = CallWindowProc(lPrevProc, hWnd, Msg, wParam, lParam)

End Function

'
' HM2Pix
'
' Converts HIMETRIC to Pixel
'
Private Function HM2Pix(ByVal Value As Long) As Long

HM2Pix = MulDiv(Value, 1440, 2540) / Screen.TwipsPerPixelX

End Function

'
' OleTranslateColor
'
' Wrapper for OleTranslateColor API
'
Private Function OleTranslateColor(ByVal Clr As Long) As Long
apiOleTranslateColor Clr, 0, OleTranslateColor
End Function

''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'''''''''''''''''''''''''''''

regards,
Hitesh.

"Tim Manos" <timmanos@t-online.de> wrote in message
news:3bc057d3$1@news.devx.com...
> Hi all,
>
> I'm trying to animate a splash screen form using the API function
> AnimateWindow as shown below:
>
> Sub Main()
> Dim aFrm As New frmSpash
> Load aFrm
> aFrm.Move (Screen.Width - aFrm.Width) / 2, (Screen.Height - aFrm.Height)
/
> 2
> Call AnimateWindow(aFrm.hwnd, AW_DURATION_DEFAULT, AW_CENTER Or
> AW_VER_POSITIVE)
> aFrm.Show '-- although calling this has no affect because the form shows
> afrer the _
> previous line of code
> aFrm.Refresh
> End Sub
>
> Private Sub Form_Unload(Cancel As Integer)
> Call AnimateWindow(Me.hwnd, AW_DURATION_DEFAULT, AW_HIDE Or AW_CENTER)
> Refresh
> End Sub
>
> Here are the declares:
> Public Const AW_HOR_POSITIVE = &H1
> Public Const AW_HOR_NEGATIVE = &H2
> Public Const AW_VER_POSITIVE = &H4
> Public Const AW_VER_NEGATIVE = &H8
> Public Const AW_CENTER = &H10
> Public Const AW_HIDE = &H10000
> Public Const AW_ACTIVATE = &H20000
> Public Const AW_SLIDE = &H40000
> Public Const AW_BLEND = &H80000
> Public Const AW_DURATION_DEFAULT = 200
> Public Declare Function AnimateWindow Lib "user32" (ByVal hwnd As Long, _
>
> ByVal dwTime As Long, _
>
> ByVal dwFlags As Long) As Long
>
> Although the animation itself works there are two things that look very
> unprofessional:
> 1. During the animation the from's background looks like an abstract
art
> painting.
> 2. I can only animate forms whose BorderStyle is other that 0 (and
that's
> the style you usually need for a splash screen)
>
> Has any of you have a solution to those issues?
>
> Thanks in advance
>
> Tim
>
>
>
>

You can try this bit of code..
It helped me get over that Artwork while the forms is loading....

''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'''''''''''''''''''''''''''''
Const GWL_WNDPROC = (-4)

Private Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA"
( _
ByVal hWnd As Long, _
ByVal nIndex As Long) As Long
Private Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA"
( _
ByVal hWnd As Long, _
ByVal nIndex As Long, _
ByVal dwNewLong As Long) As Long

Const PROP_PREVPROC = "PrevProc"
Const PROP_FORM = "FormObject"

Private Declare Function SetProp Lib "user32" Alias "SetPropA" ( _
ByVal hWnd As Long, _
ByVal lpString As String, _
ByVal hData As Long) As Long
Private Declare Function GetProp Lib "user32" Alias "GetPropA" ( _
ByVal hWnd As Long, _
ByVal lpString As String) As Long
Private Declare Function RemoveProp Lib "user32" Alias "RemovePropA" ( _
ByVal hWnd As Long, _
ByVal lpString As String) As Long

Private Declare Sub MoveMemory Lib "kernel32" Alias "RtlMoveMemory" ( _
Dest As Any, _
Src As Any, _
ByVal DestL As Long)

Const WM_PRINTCLIENT = &H318

Private Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End Type

Private Declare Function GetClientRect Lib "user32" ( _
ByVal hWnd As Long, _
lpRect As RECT) As Long

Private Declare Function apiOleTranslateColor Lib "oleaut32" Alias
"OleTranslateColor" ( _
ByVal lOleColor As Long, _
ByVal lHPalette As Long, _
lColorRef As Long) As Long

Enum AnimateWindowFlags
AW_HOR_POSITIVE = &H1
AW_HOR_NEGATIVE = &H2
AW_VER_POSITIVE = &H4
AW_VER_NEGATIVE = &H8
AW_CENTER = &H10
AW_HIDE = &H10000
AW_ACTIVATE = &H20000
AW_SLIDE = &H40000
AW_BLEND = &H80000
End Enum

Private Declare Function apiAnimateWindow Lib "user32" Alias "AnimateWindow"
( _
ByVal hWnd As Long, _
ByVal dwTime As Long, _
ByVal dwFlags As Long) As Long

Private Declare Function MulDiv Lib "kernel32" ( _
ByVal Mul As Long, _
ByVal Nom As Long, _
ByVal Den As Long) As Long

Private Declare Function CreateSolidBrush Lib "gdi32" ( _
ByVal crColor As Long) As Long
Private Declare Function BitBlt Lib "gdi32" ( _
ByVal hDestDC As Long, _
ByVal x As Long, _
ByVal y As Long, _
ByVal nWidth As Long, _
ByVal nHeight As Long, _
ByVal hSrcDC As Long, _
ByVal xSrc As Long, _
ByVal ySrc As Long, _
ByVal dwRop As Long) As Long

Private Declare Function GetDC Lib "user32" ( _
ByVal hWnd As Long) As Long
Private Declare Function CreateCompatibleDC Lib "gdi32" ( _
ByVal hDC As Long) As Long
Private Declare Function ReleaseDC Lib "user32" ( _
ByVal hWnd As Long, _
ByVal hDC As Long) As Long
Private Declare Function DeleteDC Lib "gdi32" ( _
ByVal hDC As Long) As Long
Private Declare Function FillRect Lib "user32" ( _
ByVal hDC As Long, _
lpRect As RECT, _
ByVal hBrush As Long) As Long
Private Declare Function DeleteObject Lib "gdi32" ( _
ByVal hObject As Long) As Long
Private Declare Function SelectObject Lib "gdi32" ( _
ByVal hDC As Long, _
ByVal hObject As Long) As Long

Private Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA"
( _
ByVal lpPrevWndFunc As Long, _
ByVal hWnd As Long, _
ByVal Msg As Long, _
ByVal wParam As Long, _
ByVal lParam As Long) As Long

'
' AnimateWindow
'
' Wrapper for AnimateWindow api
'
Public Sub AnimateWindow( _
ByVal Form As Form, _
ByVal dwTime As Long, _
ByVal dwFlags As AnimateWindowFlags)

' Set the properties
SetProp Form.hWnd, PROP_PREVPROC, GetWindowLong(Form.hWnd, GWL_WNDPROC)
SetProp Form.hWnd, PROP_FORM, ObjPtr(Form)

' Subclass the window
SetWindowLong Form.hWnd, GWL_WNDPROC, AddressOf AnimateWinProc

' Call AnimateWindow API
apiAnimateWindow Form.hWnd, dwTime, dwFlags

' Unsubclass the window
SetWindowLong Form.hWnd, GWL_WNDPROC, GetProp(Form.hWnd, PROP_PREVPROC)

' Remove the properties
RemoveProp Form.hWnd, PROP_FORM
RemoveProp Form.hWnd, PROP_PREVPROC

' Refresh the form
'Form.Refresh

End Sub

'
' AnimateWinProc
'
' Window procedure for AnimateWindow
'
Private Function AnimateWinProc( _
ByVal hWnd As Long, _
ByVal Msg As Long, _
ByVal wParam As Long, _
ByVal lParam As Long) As Long

Dim lPrevProc As Long
Dim lForm As Long
Dim oForm As Form

' Get the previous WinProc pointer
lPrevProc = GetProp(hWnd, PROP_PREVPROC)

' Get the form object
lForm = GetProp(hWnd, PROP_FORM)
MoveMemory oForm, lForm, 4&

Select Case Msg

Case WM_PRINTCLIENT
Dim tRect As RECT
Dim hBr As Long

' Get the window client size
GetClientRect hWnd, tRect

' Create a brush with the
' form background color
hBr = CreateSolidBrush(OleTranslateColor(oForm.BackColor))

' Fill the DC with the
' background color
FillRect wParam, tRect, hBr

' Delete the brush
DeleteObject hBr

If Not oForm.Picture Is Nothing Then
Dim lScrDC As Long
Dim lMemDC As Long
Dim lPrevBMP As Long

' Create a compatible DC
lScrDC = GetDC(0&)
lMemDC = CreateCompatibleDC(lScrDC)
ReleaseDC 0, lScrDC

' Select the form picture in the DC
lPrevBMP = SelectObject(lMemDC, oForm.Picture.Handle)

' Draw the picture in the DC
BitBlt wParam, _
0, 0, _
HM2Pix(oForm.Picture.Width), HM2Pix(oForm.Picture.Height), _
lMemDC, 0, 0, vbSrcCopy

' Release the picture
SelectObject lMemDC, lPrevBMP

' Delete the DC
DeleteDC lMemDC

End If

End Select

' Release the form object
MoveMemory oForm, 0&, 4&

' Call the original window procedure
AnimateWinProc = CallWindowProc(lPrevProc, hWnd, Msg, wParam, lParam)

End Function

'
' HM2Pix
'
' Converts HIMETRIC to Pixel
'
Private Function HM2Pix(ByVal Value As Long) As Long

HM2Pix = MulDiv(Value, 1440, 2540) / Screen.TwipsPerPixelX

End Function

'
' OleTranslateColor
'
' Wrapper for OleTranslateColor API
'
Private Function OleTranslateColor(ByVal Clr As Long) As Long
apiOleTranslateColor Clr, 0, OleTranslateColor
End Function

''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'''''''''''''''''''''''''''''

regards,
Hitesh.

"Tim Manos" <timmanos@t-online.de> wrote in message
news:3bc057d3$1@news.devx.com...
> Hi all,
>
> I'm trying to animate a splash screen form using the API function
> AnimateWindow as shown below:
>
> Sub Main()
> Dim aFrm As New frmSpash
> Load aFrm
> aFrm.Move (Screen.Width - aFrm.Width) / 2, (Screen.Height - aFrm.Height)
/
> 2
> Call AnimateWindow(aFrm.hwnd, AW_DURATION_DEFAULT, AW_CENTER Or
> AW_VER_POSITIVE)
> aFrm.Show '-- although calling this has no affect because the form shows
> afrer the _
> previous line of code
> aFrm.Refresh
> End Sub
>
> Private Sub Form_Unload(Cancel As Integer)
> Call AnimateWindow(Me.hwnd, AW_DURATION_DEFAULT, AW_HIDE Or AW_CENTER)
> Refresh
> End Sub
>
> Here are the declares:
> Public Const AW_HOR_POSITIVE = &H1
> Public Const AW_HOR_NEGATIVE = &H2
> Public Const AW_VER_POSITIVE = &H4
> Public Const AW_VER_NEGATIVE = &H8
> Public Const AW_CENTER = &H10
> Public Const AW_HIDE = &H10000
> Public Const AW_ACTIVATE = &H20000
> Public Const AW_SLIDE = &H40000
> Public Const AW_BLEND = &H80000
> Public Const AW_DURATION_DEFAULT = 200
> Public Declare Function AnimateWindow Lib "user32" (ByVal hwnd As Long, _
>
> ByVal dwTime As Long, _
>
> ByVal dwFlags As Long) As Long
>
> Although the animation itself works there are two things that look very
> unprofessional:
> 1. During the animation the from's background looks like an abstract
art
> painting.
> 2. I can only animate forms whose BorderStyle is other that 0 (and
that's
> the style you usually need for a splash screen)
>
> Has any of you have a solution to those issues?
>
> Thanks in advance
>
> Tim
>
>
>
>