课程内容.txt

Windows程序运行原理及程序编写流程

Windows程序运行原理及程序编写流程，窗口产生过程，句柄原理，消息队列，回调函数，窗口关闭与应用程序退出的工作关系，使用VC++的若干小技巧，stdcall与cdecl调用规范的比较，初学者常犯错误及注意事项。

***********************************注意******************************
Windows子系统设置错误, 提示:
libcmtd.lib(crt0.obj) : error LNK2001: unresolved external symbol _main
Windows项目要使用Windows子系统, 而不是Console, 可以这样设置:
[Project] --> [Settings] --> 选择"Link"属性页, 在Project Options中将/subsystem:console改成/subsystem:windows
**********************先按以上要求更改设置才可运行成功************************
一下是源程序：

#include <windows.h>
#include <stdio.h>

LRESULT CALLBACK WinSunProc(
  HWND hwnd,      // handle to window
  UINT uMsg,      // message identifier
  WPARAM wParam,  // first message parameter
  LPARAM lParam   // second message parameter
);

int WINAPI WinMain(
  HINSTANCE hInstance,      // handle to current instance
  HINSTANCE hPrevInstance,  // handle to previous instance
  LPSTR lpCmdLine,          // command line
  int nCmdShow              // show state
)
{
	WNDCLASS wndcls;
	wndcls.cbClsExtra=0;
	wndcls.cbWndExtra=0;
	wndcls.hbrBackground=(HBRUSH)GetStockObject(BLACK_BRUSH);
	wndcls.hCursor=LoadCursor(NULL,IDC_CROSS);
	wndcls.hIcon=LoadIcon(NULL,IDI_ERROR);
	wndcls.hInstance=hInstance;
	wndcls.lpfnWndProc=WinSunProc;
	wndcls.lpszClassName="Weixin2003";
	wndcls.lpszMenuName=NULL;
	wndcls.style=CS_HREDRAW | CS_VREDRAW;
	RegisterClass(&wndcls);

	HWND hwnd;
	hwnd=CreateWindow("Weixin2003","北京维新科学技术培训中心",WS_OVERLAPPEDWINDOW,
		0,0,600,400,NULL,NULL,hInstance,NULL);

	ShowWindow(hwnd,SW_SHOWNORMAL);
	UpdateWindow(hwnd);

	MSG msg;
	while(GetMessage(&msg,NULL,0,0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return 0;
}

LRESULT CALLBACK WinSunProc(
  HWND hwnd,      // handle to window
  UINT uMsg,      // message identifier
  WPARAM wParam,  // first message parameter
  LPARAM lParam   // second message parameter
)
{
	switch(uMsg)
	{
	case WM_CHAR:
		char szChar[20];
		sprintf(szChar,"char is %d",wParam);
		MessageBox(hwnd,szChar,"weixin",0);
		break;
	case WM_LBUTTONDOWN:
		MessageBox(hwnd,"mouse clicked","weixin",0);
		HDC hdc;
		hdc=GetDC(hwnd);
		TextOut(hdc,0,50,"计算机编程语言培训",strlen("计算机编程语言培训"));
		ReleaseDC(hwnd,hdc);
		break;
	case WM_PAINT:
		HDC hDC;
		PAINTSTRUCT ps;
		hDC=BeginPaint(hwnd,&ps);
		TextOut(hDC,0,0,"维新培训",strlen("维新培训"));
		EndPaint(hwnd,&ps);
		break;
	case WM_CLOSE:
		if(IDYES==MessageBox(hwnd,"是否真的结束？","weixin",MB_YESNO))
		{
			DestroyWindow(hwnd);
		}
		break;
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hwnd,uMsg,wParam,lParam);
	}
	return 0;
}