我想在对话框里显示一个不规则的图片，并且让空白部分透明？？？！各位大哥帮帮忙啊！！

[ww012]

如题

[nwpulipeng]

n多高手在这里呀!!

[jag1976]

.h中：
CBitmap * m_oldBitmap;
CDC m_DC;
.cpp OnInitDialog()
{
....

CBitmap bitmap;
BITMAP bitInfo;
bitmap.LoadBitmap(IDB_BACKGROUND);
//µÃµ½Í¼Æ¬´óС²¢µ÷Õû´°¿Ú´óСÊÊӦͼƬ
bitmap.GetBitmap(&bitInfo);
CRect rect;
GetWindowRect(&rect);
rect.right = rect.left + bitInfo.bmWidth;
rect.bottom = rect.top + bitInfo.bmHeight;
MoveWindow(rect);

m_DC.CreateCompatibleDC(GetDC());
m_oldBitmap = m_DC.SelectObject(&bitmap);

COLORREF maskColor = RGB(255,0,0);//背景色

#define LWA_COLORKEY 0x00000001
#define WS_EX_LAYERED 0x00080000

typedef BOOL (WINAPI *lpfnSetLayeredWindowAttributes)(HWND hWnd, COLORREF crKey, BYTE bAlpha, DWORD dwFlags);
lpfnSetLayeredWindowAttributes SetLayeredWindowAttributes;

HMODULE hUser32 = GetModuleHandle("user32.dll");
SetLayeredWindowAttributes = (lpfnSetLayeredWindowAttributes)GetProcAddress(hUser32,"SetLayeredWindowAttributes");
SetWindowLong(GetSafeHwnd(), GWL_EXSTYLE, GetWindowLong(GetSafeHwnd(), GWL_EXSTYLE) | WS_EX_LAYERED);
SetLayeredWindowAttributes(GetSafeHwnd(), maskColor, 255, LWA_COLORKEY);
FreeLibrary(hUser32);
}
OnCancel()
{

CBitmap * bitmap = m_DC.SelectObject(m_oldBitmap);
m_DC.DeleteDC();
bitmap->DeleteObject();

CDialog::OnCancel();

}

[jag1976]

OnPaint()

{
CDC * pDC = this->GetDC();
CRect rect;
GetWindowRect(&rect);
pDC->BitBlt(0,0,rect.Width(),rect.Height(),&m_DC,0,0,SRCCOPY);
}

[菜牛]

TransparentBlt();

[lygfqy]

www.vckbase.com上例子多的很，自己载一个看看

[Meteorlet]

像素颜色自身异或就透明了

[快乐鹦鹉]

这好办。设置裁减就行了。

[DentistryDoctor]

http://www.codeguru.com/Cpp/G-M/bitmap/specialeffects/article.php/c1729/

[DentistryDoctor]

http://www.codeguru.com/Cpp/G-M/bitmap/specialeffects/article.php/c1773/

[lixiaosan]

http://www.codeguru.com/Cpp/G-M/bitmap/specialeffects/article.php/c1729/

[ww012]

我图片的四角都是圆形的，不是矩形的，这个怎么实现啊！我一时找不到恰当的例子

[ww012]

谢谢大家！