Windows程序设计_19_测试Windows应用程序加载函数

最新推荐文章于 2024-08-14 10:47:58 发布

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最新推荐文章于 2024-08-14 10:47:58 发布

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本程序展示了如何测试自定义的WinMainCRTStartup函数，通过将文本居中显示来验证函数的有效性。

/*
  本程序测试自定义的WinMainCRTStartup函数
*/

#define STRICT
#define WIN32_LEAN_AND_MEAN

#include <windows.h>
#include <tchar.h>
#include <assert.h>

//PIMAGE_DOS_HEADER 

void CenterText(HDC hDC,int x,int y,LPCTSTR szFace,LPCTSTR szMessage,int point)
{
    HFONT hFont=CreateFont(- point * GetDeviceCaps(hDC,LOGPIXELSY)/72,
                            0,
                            0,
                            0,
                            FW_BOLD,
                            TRUE,
                            FALSE,
                            FALSE,
                            ANSI_CHARSET,
                            OUT_TT_PRECIS,
                            CLIP_DEFAULT_PRECIS,
                            PROOF_QUALITY,
                            VARIABLE_PITCH,
                            szFace
                            );
    assert(hFont);

    HGDIOBJ hOld=SelectObject(hDC,hFont);
    SetTextAlign(hDC,TA_CENTER | TA_BASELINE);
    SetBkMode(hDC,TRANSPARENT);
    SetTextColor(hDC,RGB(0,0,0xFF));
    TextOut(hDC,x,y,szMessage,_tcslen(szMessage));
    SelectObject(hDC,hOld);
    DeleteObject(hOld);
}

const TCHAR szMessage[]=_T("Hello world");
const TCHAR szFace[]=_T("Times New Roman");

#pragma comment(linker,"-merge:rdata=.text")
//#pragma comment(linker,"-align:512")

extern "C" void WinMainCRTStartup()
{
    HDC hDC=GetDC(NULL);
    assert(hDC);

    CenterText(hDC,GetSystemMetrics(SM_CXSCREEN)/2,GetSystemMetrics(SM_CYSCREEN)/2,szFace,szMessage,72);

    ReleaseDC(NULL,hDC);
    ExitProcess(0);
}