win32可以自定义消息

#include <windows.h>
#include <process.h>
#include <math.h>

#define CLSNAME "Bigjob1"
#define WNDNAME "yanshi"

#define REP 1000000
#define STATUS_READY 0
#define STATUS_WORKING 1
#define STATUS_DONE 2

#define WM_CALC_DONE (WM_USER+0)
#define WM_CALC_ABORTED (WM_USER+1)

typedef struct
{
	HWND hwnd;
	BOOL bContinue;
}
PARAMS,*PPARAMS;

LRESULT APIENTRY WindowProc(HWND hwnd,
							UINT uMsg,
							WPARAM wParam,
							LPARAM lParam
							);

int WINAPI WinMain (HINSTANCE hInstance,
					HINSTANCE hPrevInstance,
					PSTR szCmdLine, 
					int iCmdShow)
{
	static TCHAR clsname[] = TEXT(CLSNAME);
	WNDCLASS wndclass;
	wndclass.style = CS_HREDRAW | CS_VREDRAW ;
	wndclass.lpfnWndProc = WindowProc ;
	wndclass.cbClsExtra = 0 ;
	wndclass.cbWndExtra = 0 ;
	wndclass.hInstance = hInstance ;
	wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
	wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
	wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
	wndclass.lpszMenuName = NULL ;
	wndclass.lpszClassName = clsname ;

	if(!::RegisterClass(&wndclass))
	{
		MessageBox ( NULL, 
			TEXT ("This program requires Windows NT!"),
			clsname, 
			MB_ICONERROR) ;
		return 0 ;
	}

	HWND hwnd;
	hwnd = ::CreateWindow(clsname,TEXT(WNDNAME),
		WS_OVERLAPPEDWINDOW,
		CW_USEDEFAULT,CW_USEDEFAULT,
		CW_USEDEFAULT,CW_USEDEFAULT,
		NULL,NULL,hInstance,NULL);
	::ShowWindow(hwnd,SW_SHOW);
	::UpdateWindow(hwnd);

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

VOID Thread(PVOID pvoid)
{
	double A = 1.0;
	INT i;
	LONG lTime;
	volatile PPARAMS pparams;

	pparams = (PPARAMS)pvoid;

	lTime = ::GetCurrentTime();

	for(i=0; i<REP&&pparams->bContinue; i++)
		A = ::tan(atan(exp(log(sqrt(A*A)))))+1.0;

	if(i == REP)
	{
		lTime = ::GetCurrentTime();
		::SendMessage(pparams->hwnd,WM_CALC_DONE,0,lTime);
	}
	else
		::SendMessage(pparams->hwnd,WM_CALC_ABORTED,0,0);

	::_endthread();
}

LRESULT APIENTRY WindowProc(HWND hwnd,
							UINT uMsg,
							WPARAM wParam,
							LPARAM lParam
							)
{
	static INT iStatus;
	static LONG lTime;
	static PARAMS params;
	static TCHAR * szMessage[] = 
	{TEXT("ready(left mouse button begins)"),
	TEXT("working(right mouse button ends)"),
	TEXT("%d repetitions in %d msec")};

	HDC hdc;
	PAINTSTRUCT ps;
	RECT rect;
	TCHAR szBuffer[64];

	switch(uMsg)
	{
	case WM_LBUTTONDOWN:
		if(iStatus == STATUS_WORKING)
		{
			::MessageBeep(0);
			return 0;
		}

		iStatus = STATUS_WORKING;

		params.hwnd = hwnd;
		params.bContinue = TRUE;

		::_beginthread(Thread,0,&params);

		::InvalidateRect(hwnd,NULL,TRUE);
		return 0;

	case WM_RBUTTONDOWN:
		params.bContinue = FALSE;
		return 0;

	case WM_CALC_DONE:
		lTime =lParam;
		iStatus = STATUS_DONE;
		::InvalidateRect(hwnd,NULL,TRUE);
		return 0;

	case WM_CALC_ABORTED:
		iStatus = STATUS_READY;
		::InvalidateRect(hwnd,NULL,TRUE);
		return 0;

	case WM_DESTROY:
		::PostQuitMessage(0);
		return 0;

	case WM_PAINT:
		hdc = ::BeginPaint(hwnd,&ps);

		::GetClientRect(hwnd,&rect);

		::wsprintf(szBuffer,szMessage[iStatus],REP,lTime);
		::DrawText(hdc,szBuffer,-1,&rect,DT_SINGLELINE|
			DT_CENTER|DT_VCENTER);

		::EndPaint(hwnd,&ps);
		return 0;
	}
	return ::DefWindowProc(hwnd,uMsg,wParam,lParam);
}

#define WM_CALC_DONE (WM_USER+0)

#define WM_CALC_ABORTED (WM_USER+1)

这两句已经很明显了，可以自定义消息那改多有趣啊！！