Internet use MemDC all say can solve the problem of the splash screen, but tried it on and don't want to,
Have a great god can explain what reason be?

 void CMy555Dlg: : OnPaint () 
{
If (IsIconic ()) 
{
CPaintDC dc (this);//device context for painting 

SendMessage (WM_ICONERASEBKGND, (WPARAM) dc. GetSafeHdc (), 0). 

//Center icon in the client rectangle 
Int cxIcon=GetSystemMetrics (SM_CXICON); 
Int cyIcon=GetSystemMetrics (SM_CYICON); 
CRect the rect. 
GetClientRect (& amp; The rect); 
Int x=(the rect. Width () - cxIcon + 1)/2; 
Int y=(the rect. Height () - cyIcon + 1)/2; 

//Draw the icon 
Dc. DrawIcon (x, y, m_hIcon); 
} 
The else 
{
CDialog: : OnPaint (); 
} 


The CDC * pDC=GetDC ();/////////////black back 
The CDC MemDC;//define a first display device object 
CBitmap MemBitmap;//define a bitmap object 

//then establish a compatible with screen display memory display device 
MemDC. CreateCompatibleDC (NULL); 
//can't drawing at this moment, because there is no place to paint ^_^ 
//below to create a compatible with screen display bitmap, as to the size of the bitmap, can use the size of the window 
MemBitmap. CreateCompatibleBitmap (pDC, 400400); 

//will be chosen bitmap into memory display device in the 
//only the memory for the bitmap display device is drawing, painting on the specified bitmap 
CBitmap * pOldBit=MemDC. SelectObject (& amp; MemBitmap); 

//use the background color first bitmap clean, here I was using a white background as a 
//you can also use you should use the color of the 
MemDC. FillSolidRect (0,0,400,400 BLACK_BRUSH); 


(BLACK_BRUSH MemDC. SelectStockObject ()); 
MemDC. A Rectangle (0,0,574,250); 
Crect. Top=0 + I; 
Crect. Bottom=30 + I; 
Crect. Left=20, 
Crect. Right=50; 


MemDC. SelectStockObject (WHITE_BRUSH); 
MemDC. A Rectangle (crect); 
//copies a figure from a memory to the screen for display 

PDC - & gt; BitBlt (0,0,400,400, & amp; MemDC, 0, 0, SRCCOPY); 

//the drawing after completion of cleaning 
MemBitmap. DeleteObject (); 
MemDC. DeleteDC (); 

} 

//The system calls this to obtain The cursor to display while The user drags 
//the minimized window. 
HCURSOR CMy555Dlg: : OnQueryDragIcon () 
{
Return (HCURSOR) m_hIcon; 
} 

Void CMy555Dlg: : OnTimer (UINT nIDEvent) 
{
I=I + 1; 
Invalidate (). 

//TODO: Add your message handler code here and/or call the default 

CDialog: : OnTimer (nIDEvent); 
} 

Look,

CodePudding user response:

watch, also have the same problem