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  • Status: Solved
  • Priority: Medium
  • Security: Public
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Print Active window repainted just after SetForegroundWindow

Hi Experts,

I know how to print the active application using SetForegroundWindow.

The problem is when I use :
SetForegroundWindow(hwnd);    // focus the window I  want
PrintActiveApp();                        // print this window  (no problem)

The problem is when the window is hidden behind another one, there is kind of delay before the window is repainted (so a part of the top window is drawn on the picture).

I only want to be sure the focused window is the one I want and this window is drawn properly to print it.

Thanks in advance for your help.
0
noulouk
Asked:
noulouk
  • 2
2 Solutions
 
prosh0tCommented:

other than throwing in a sleep which could be unreliable, have you tried this?

SetForegroundWindow(hwnd);    // focus the window I  want

while(GetForegroundWindow() != hwnd)
{
    Application.DoEvents();
}

PrintActiveApp();                        // print this window  (no problem)

This would only work if a window considered foreground AFTER it is actually fully drawn..  I'm not sure how getforegroundindow works but it's worth a shot


0
 
Gautham JanardhanCommented:
call the Invalidate method
0
 
Gautham JanardhanCommented:
also check this site

http://msdn.microsoft.com/msdnmag/issues/06/03/WindowsFormsPerformance/default.aspx#S6

look for painting Painting Performance
0
 
nouloukAuthor Commented:
while(GetForegroundWindow() != hwnd)
{
    Application.DoEvents();
}

It doesn't work : I don't know when the active window is repainted because this loop doesn't wait for the paint, but get the foregroundwindow state I think.

gauthampj, I  need to use that with the active window of another app, your solution works only with my own.
0

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