Picture Control changed visibility after changed focus

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Here I am working on MFC dialogue based application,in which there are multiple child dialogues added in tab control;In one child dialogue there are multiple picture controls and I changed bitmap image dynamically on button clicked event,whenever I clicked one of the picture controls and switched to another tab(for Testing purpose)and coming back to current picture control tab that time all controls(which I've clicked previous time)are invisible!!!
How that change occurred and how to solve that problem???

Posted 1-May-13 18:53pm

Venkat Raghvan

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Sergey Alexandrovich Kryukov 2-May-13 1:04am

It means you screwed up something; it should not happen. But how anyone can know what exactly, if you did not provide any code sample?
—SA

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Style-7 · Answer 1 · 2013-05-01T20:03:00

Solution 1

This depends of type of the picture control: owned draw, frame, bitmap etc...
Try redraw dialog by InvalidateRect() on "OnTab" event.
Or set WM_PAINT of the dialog and GetDC( GetDlgItem( hDlg, ID_PICTURE_CONTROL) ) etc..
Or use sub classing tecnology and write code of WM_PAINT event.

Posted 1-May-13 20:03pm

Style-7

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Venkat Raghvan 3-May-13 10:03am

can you please give me some code snippets for reference!because I've tried on Tab control function,but doesn't happened

Style-7 4-May-13 1:32am

case WM_PAINT:{
PAINTSTRUCT ps;
HDC hdc;
BeginPaint( hDlg, &ps);
HWND wnd =GetDlgItem( hDlg, IDC_MINI_BOARD);
hdc = GetDC( wnd);
................................................
ReleaseDC( wnd, hdc);
EndPaint( hDlg, &ps);
break;
}