HICON与HBITMAP相互转换

将BMP转换成ICON图标
方法一、

HICON HICONFromCBitmap( CBitmap& bitmap)

{

BITMAP bmp;

bitmap.GetBitmap(&bmp);



HBITMAP hbmMask = ::CreateCompatibleBitmap(::GetDC(NULL),

bmp.bmWidth, bmp.bmHeight);



ICONINFO ii = {0};

ii.fIcon = TRUE;

ii.hbmColor = bitmap;

ii.hbmMask = hbmMask;



HICON hIcon = ::CreateIconIndirect(&ii);//一旦不再需要，注意用DestroyIcon函数释放占用的内存及资源

::DeleteObject(hbmMask);



return hIcon;

}

方法二、

#include <gdiplus.h>

#pragma comment(lib,"GdiPlus.lib")



HICON CreateIcon(HBITMAP hBitmap)

{

Gdiplus::Bitmap* pTmpBitmap=Gdiplus::Bitmap::FromHBITMAP(hBitmap,NULL);

HICON hIcon=NULL;

pTmpBitmap->GetHICON(&hIcon);

delete pTmpBitmap;

return hIcon;

}



HICON转HBITMAP
利用GetIconInfo函数获取ICONINFO信息, 再将其复制到位图当中去, 代码如下:

HBITMAP ConvertIconToBitmap(HICON hIcon)

{

HBITMAP hBmp;

BITMAP bmp;

CDC bmpDC;

CDC iconDC;

ICONINFO csII;

int bRetValue = ::GetIconInfo(hIcon, &csII);

if (bRetValue == FALSE) return NULL;

bmpDC.Attach(::GetDC(NULL));

iconDC.CreateCompatibleDC(&bmpDC);

if (::GetObject(csII.hbmColor, sizeof(BITMAP), &bmp))

{

DWORD dwWidth = csII.xHotspot*2;

DWORD dwHeight = csII.yHotspot*2;

hBmp= ::CreateBitmap(dwWidth, dwHeight, bmp.bmPlanes,

bmp.bmBitsPixel, NULL);

iconDC.SelectObject(csII.hbmColor);

bmpDC.SelectObject(hBmp);

bmpDC.BitBlt(0,0,dwWidth,dwHeight,&iconDC,0,0,SRCCOPY);

return hBmp;

}

return NULL;

}

还有一种方法就是先创建一个兼容位图, 然后通过API函数::DrawIcon()复制上去, CopyImage函数可以用来替换创建兼容DC以后的那些骤了