How to set focus to owner or another window?

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I use CreateWindow to create a window, say window 'A', and window 'A' creates window 'B'. when 'B' is closed, focus is given to 'A', which is reasonable. buf if before closing 'B' I click on the window of another application and then close 'B', then the systems transfers focus to that application, not 'A'. I want to change this behaviour and try setfocus to window 'A' directly, buf I was not successfull. I tried these codes

C++

SetFocus( hWndA );
SendMessage( hWndA, WM_SETFOCUS, 0, 0 );
PostMessage( hWndA, WM_SETFOCUS, 0, 0 );
SendMessage( hWndA, WM_APP, 0, 0 );
PostMessage( hWndA, WM_APP, 0, 0 );

where window 'A' responds to WM_APP by setting focus to itself, and none of them workded. SetFocus simply failes, Can any body help me?

Posted 20-Mar-12 15:53pm

mr.abzadeh

Updated 29-May-15 1:21am

Frankie-C

v2

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5 solutions

Solution 2

Hi.
one method, I think.
When 'A' create 'B' window, you can inherit the 'A''s windows handle to 'B' window.
and in windowprocmessage of 'B', you can implement WM_DESTROY as follow.
1.set focus to 'A' window by handles, which is given from 'A' window.
and close 'B'window.
2.use ShowWindow function as parameter with the handles which you got from 'A' window.

Posted 20-Mar-12 20:03pm

Otto Lehmann

Comments

mr.abzadeh 21-Mar-12 16:20pm

Thanks for your interest
I couldn't know clearly what you point out. how to "inherit the 'A''s windows handle to 'B' window"? I used both SetFocus and ShowWindow, and none of them worked

Solution 3

You might be better to use ShowWindow(HWND hwnd) function instead of SetFocus() function.
Just do like this.
ShowWindow(hWndA, SW_HIDE);
ShowWindow(hWndA, SW_SHOW);

it will set focus to 'A' window.

Posted 20-Mar-12 20:22pm

Otto Lehmann

Comments

mr.abzadeh 21-Mar-12 16:27pm

ShowWindow didn't work, I did a thrick to solve the problem. Instead of
case WM_CLOSE:
SetFocus( hWndA );
DestroyWindow( hWndB );
I used this code
case WM_CLOSE:
SetFocus( hWndA );
PostMessage( hWndB, WM_APP_CLOSE, 0, 0 );
break;
case WM_APP_CLOSE:
DestroyWindow( hWndB );
break;
Indeed, SetFocus works if the message being processed does not destroy the window 'A', and I postponed the window destruction by posting an application defined message.

[no name] 29-Mar-12 22:15pm

I mean to use both two statement with SW_HIDE and SW_SHOW parameters.

Solution 4

if you set the Owner of B to A, your problem will solve.

Posted 27-Jun-13 22:28pm

saboor awan

Solution 5

You can try following:
SetForegroundWindow(FindWindowA(NULL,"Name of the window you want to set focus to"));

This worked for me to set focus to particular window.

Thanks.

Posted 29-May-15 1:12am

Member 9449431

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Sergey Alexandrovich Kryukov · Accepted Answer · 2012-03-20T16:50:00

For a Window, you should activate it. A focus is a property of a control. More exactly, this keyboard focus; only one control at a time in the whole system can have it.

You need to use this Windows API:
http://msdn.microsoft.com/en-us/library/windows/desktop/ms646311%28v=vs.85%29.aspx[^],
http://msdn.microsoft.com/en-us/library/windows/desktop/ms633539%28v=vs.85%29.aspx[^].

When a window is done foreground and activated, you can focus one of its controls.

—SA