//設置頭文件

#include "Gdiplus.h"
using namespace Gdiplus;
#pragma comment(lib,"Gdiplus.lib")

//在...app.h中

GdiplusStartupInput gdiplusStartupInput;
ULONG_PTR?????????? gdiplusToken;
//初始化

GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);

//系統界面的消息循環

CGdiPlusTestDlg dlg;
m_pMainWnd = &dlg;
int nResponse = dlg.DoModal();

//關閉gdiplus的環境
??????? GdiplusShutdown(gdiplusToken);

?

BOOL CGdiPlusTestDlg::UpdateWindow()
{

??? HDC hdc=::GetDC(m_hWnd);
??? HDC hdcMem=::CreateCompatibleDC(hdc);
??? HBITMAP hBmp=::CreateCompatibleBitmap(hdc,200,200);
??? ::SelectObject(hdcMem,hBmp);

??? Graphics g(hdcMem);
??? Image img(L"C://ClockBackchain1.png");

??? g.DrawImage(&img,0,0,200,200);

??? CRect rc;
??? GetWindowRect(&rc);
??? POINT ptWindow={rc.left,rc.top};
??? SIZE szWindow={200,200};
??? POINT ptSrc={0,0};

??? BLENDFUNCTION blend;
??? blend.SourceConstantAlpha=255;
??? blend.BlendFlags = 0;
??? blend.BlendOp=0;
??? blend.AlphaFormat=1;

??? DWORD dwExStyle=GetWindowLong(m_hWnd,GWL_EXSTYLE);
??? if((dwExStyle&0x80000)!=0x80000)
??????? SetWindowLong(m_hWnd,GWL_EXSTYLE,dwExStyle^0x80000);

??? BOOL nRet =::UpdateLayeredWindow(m_hWnd,hdc,&ptWindow,&szWindow,hdcMem,
??????? &ptSrc,0,&blend,2);

??? ::DeleteDC(hdcMem);
??? ::ReleaseDC(m_hWnd,hdc);

??? return TRUE;
}

void CGdiPlusTestDlg::OnTimer(UINT nIDEvent)
{
??? UpdateWindow();
??? CDialog::OnTimer(nIDEvent);
}

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