Continue to do interface, after the last time for child Windows, although can move, but move is very unnatural, the splash screen is very serious, and the WM_PAINT, window drawing method, and when the window is too much, the program is likely to enter infinite loop eventually collapse, put a few picture:
1. The program crashes

2. Double buffer error using the

3. The expected effect

Then hear double buffer drawing can effectively improve the efficiency, and prevent many bugs, so I want to use double buffer try:

 void Draw_Panel (HDC& Hdc_old, HWND HWND PAINTSTRUCT& Ps, the RECT rc, TCHAR TXT [40], HFONT HFONT, LOGFONT lf) 
{
HBRUSH gets=NULL; 
HPEN HPEN=0; 
HPEN HPF=0; 
HDC HDC=CreateCompatibleDC (hdc_old); 
Gets=CreateSolidBrush (UICOLOR_PANEL); 
SelectObject (HDC, gets); 
FillRect (HDC, & amp; Rc, gets); 

DeleteObject (gets); 

GetWindowText (hWnd, TXT, 40); 
SetTextColor (HDC, UICOLOR_BUTTON_TEXT); 
SetBkMode (HDC, TRANSPARENT); 
If (hFont==0) 
{
Memset (& amp; Lf, 0, sizeof (LOGFONT)); 
Lf. LfHeight=- 16; 
Wcscpy (lf) lfFaceName, L "bold"); 
HFont=CreateFontIndirect (& amp; Lf);//create the font 
} 
HFONT old=(HFONT) SelectObject (HDC, HFONT); 

DrawText (HDC, TXT, wcslen (TXT), & amp; Rc, DT_SINGLELINE | DT_CENTER | DT_VCENTER); 

DrawFramePanel (HDC, hpen, rc, 2, UICOLOR_PANEL_FRAME); 

BitBlt (hdc_old, 0, 0, rc. Right, rc. Bottom, HDC, 0, 0, SRCCOPY); 
DeleteObject (hpen); 
//UpdateWindow (hWnd); 


DeleteDC (HDC); 
ReleaseDC (hWnd, HDC); 
OutputDebugStringA (TIPBOX_PANEL "PAINT"); 
} 

 case WM_PAINT: 
{
HDC=BeginPaint (hWnd, & amp; Ps); 
Memset (& amp; Lf, 0, sizeof (LOGFONT)); 
VertexUI_Draw_Panel (HDC, hWnd, ps, rc, TXT, hFont, lf); 
EndPaint (hWnd, & amp; Ps); 
break; 
} 
Case WM_ERASEBKGND: 
{
return 1; 
} 

But I must be doing wrong steps, so draw something is pure white, does not display, can you tell me where the fault is, thank you