How to make an application get focus

[Frank]

I am developping product which consist of two applications, let me name them
A and B. B is an ActiveX EXE(standalone) which exposes a class C.
C will provide the communication channel between A and B. In A, I create
an object ObjC of C. A and B, each has a button, when you click on the button
in A, the focus will turn to B. When clicking on the button in B,
the focus is supposed to turn to A. C exposes a method Setfocus. in A,
Calling ObjC.SetFocus which calls the SetFocus of the main form in B.
Objc exposes an event. A will receive the event when B raises it. In the
event procedure, A calls the Form's SetFocus.

It is supposed to work. The result is that Setfocus of Form seems not work.
Sometimes it works. Here A is a MDI application and B is a SDI

It is for sure that all Setfocus is called. Any processes happened, but in
term of behavior, nothing happened.

Any help would be highly appreciated.

Thank a lot in advance

Frank

[Kenny Acock]

Frank,

Try the SetForegroundWindow API:

Declare Function SetForegroundWindow Lib "user32" (ByVal hWnd As Long) _
As Long

Declare this in both A and B. If A calls this to set focus for B all you
will get is the flashing taskbar button. So A & B should call it for themselves.
When A wants focus, A calls it for itself, and also B calls it for itself.

You can call it like this:

lReturn = SetForegroundWindow(Me.hWnd)
or
SetForegroundWindow Me.hWnd

I haven't tested this, but it should work.

--Kenny

[Frank]

Hi, Kenny,

I already totally solved the problem.

Thanks a lot

Frank

"Kenny Acock" <kennya@teacherspal.com> wrote:
>
>Frank,
>
>Try the SetForegroundWindow API:
>
>Declare Function SetForegroundWindow Lib "user32" (ByVal hWnd As Long) _
> As Long
>
>Declare this in both A and B. If A calls this to set focus for B all you
>will get is the flashing taskbar button. So A & B should call it for themselves.
> When A wants focus, A calls it for itself, and also B calls it for itself.
>
>You can call it like this:
>
>lReturn = SetForegroundWindow(Me.hWnd)
> or
>SetForegroundWindow Me.hWnd
>
>I haven't tested this, but it should work.
>
>--Kenny