hello.cpp

C++编写的程序源码,里有21天学通C++的课后作业源码和章节源码.

#include<windows.h>
#include"basetsd.h"

LRESULT CALLBACK WndProc (HWND,UINT,WPARAM,LPARAM);
int WINAPI WinMain (HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR szCmdLine,int iCmdShow)
{
	HWND hwnd;
	MSG msg;
	WNDCLASS wndclass;
	wndclass.style=CS_HREDRAW | CS_VREDRAW;
	wndclass.lpfnWndProc=WndProc;
	wndclass.cbClsExtra=0;
	wndclass.cbWndExtra=0;
	wndclass.hInstance=hInstance;
	wndclass.hIcon=LoadIcon(NULL,IDirect3DCATION);
	wndclass.hCursor=LoadCursor(NULL,IDC_ARROW);
	wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
	wndclass.lpszMenuName=NULL;
	wndclass.lpszClassName="hello!";
	if(!RegisterClass(&wndclass))
	{
		MessageBox(NULL,TEXT("this program requires windows"),"a simple program ",MB_ICONERROR);
		return 0;
	}
	hwnd=CreateWindow("hello!",TEXT("a simple program !"),WS_OVERLAPPEDWINDOW,10,10,100,100,NULL,NULL,hInstance,NULL);
	ShowWindow(hwnd,iCmdShow);
	UpdateWindow(hwnd);
	while (GetMessage(&msg,NULL,0,0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)
{
	HDC hdc;
	PAINTSTRUCT ps;
	RECT rect;
	switch(message)
	{
	case WM_PAINT:
			hdc=BeginPaint(hwnd,&ps);
			GetClientRect(hwnd,&rect);
			DrawText(hdc,TEXT("welcome to vc++"),15,&rect,DT_SINGLELINE | DT_CENTER | DT_VCENTER);
			EndPaint(hwnd,&ps);
			return 0;
	case WM_DESTROY:
		PostQuitMessage(0);
		return 0;
	}
	return DefWindowProc(hwnd,message,wParam,lParam);
}