[Dev-C++] DIB, Invalidate, flicker... please help

[tichy <ti...@po...>]

Hi everybody,
I am new on this list because I'am newby to dev-cpp programming too.
Earlier I did my C/C++ progs with CBuilderX or BCB but all over the time =
my
favorite
language was Pascal (with Delphi). I have a bit expierience with Win32 AP=
I,
but when
I start to use dev-cpp the steairs seams to grown up.
My api uses a tab controll asociated with main window.
There are some other controls too asociated with the main window (ie. sta=
tus
bar)
standing visible all the time. Other controls visibility hangs on tab ind=
ex.
On the page called "gobos" I have listbox to choose file/directory and a
small static window to display
choosen image file. This is made on LBN_DBLCLK msg.
Code to display bitmap is executed on WM_PAINT event. Here is it:
    case WM_PAINT:
    {
     if(int iPage =3D TabCtrl_GetCurSel( g_hwndTab )=3D=3D 3)
     {

     HDC hdc =3D BeginPaint(g_hwndBMP, &ps);//pobierz hdc celu
     if(hdc =3D=3DNULL)MessageBox(g_hwndMain,"brak kontekstu","",MB_OK);
     HDC memoryDC =3D CreateCompatibleDC( hdc );//kreuj =BCr=F3d=B3owy hd=
c
     GetClientRect(g_hwndBMP, &rcClient);
     HBITMAP bmp =3D CreateCompatibleBitmap( hdc, rcClient.right,
rcClient.bottom );
     HBITMAP oldBmp =3D (HBITMAP)SelectObject( memoryDC, g_bmp );//przypi=
sz
bitmap=EA do kontekstu
     BitBlt( hdc, 0, 0, rcClient.right, rcClient.bottom, memoryDC, 0, 0,
SRCCOPY );
     SelectObject( memoryDC, oldBmp );
     DeleteDC( memoryDC );
     DeleteObject( bmp );
     EndPaint(g_hwndBMP, &ps);
     }

   GetClientRect(g_hwndMain, &rcClient);                      WHEN I OMIT
THIS THREE PROCEDURES
   InvalidateRect(g_hwndMain, &rcClient, TRUE);          THE MAIN WINDOW
OPENS EMPTY
   UpdateWindow(g_hwndMain);                                    AND GRAYE=
D

   break;

g_bmp points to bitmap loaded from file on LBN_DBLCLK.

My problem is that since I've added this OnPaint event as shown upper, al=
l
tab control rectangle does not refresh at all,
and listbox doesn't refresh itself too -  initially there are only its it=
ems
(strings) visible untill I refresh it with mouse pointer;
and drawn image flickers.
Controls asociated with other tab's pages refreshes randomly.
Where are the faults?

Andrzej Kry=F1ski
http:\\tichy.fm.interia.pl  (for polish readers only)



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Przetestowano na: 2005-03-09 18:33:23
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