(基础)SDK 定时器

#include <Windows.h>
#include "resource.h"
#include <stdio.h>

void RegisterClass_CLS(WNDCLASS &wndcls, const HINSTANCE hInstance);
void CreateWindow_Wnd(HWND &hWnd,const HINSTANCE hInstance);

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


int WINAPI WinMain( __in HINSTANCE hInstance, __in_opt HINSTANCE hPrevInstance, 
	                __in LPSTR lpCmdLine, __in int nShowCmd )
{
    WNDCLASS cls;
	RegisterClass_CLS(cls,hInstance);

	if( !RegisterClass(&cls) ){
		MessageBox(NULL,TEXT("注册窗口类失败!"),TEXT("标题"),MB_OKCANCEL);
		return -1;
	}

	HWND  hWnd;
	CreateWindow_Wnd(hWnd,hInstance);
	if( !hWnd ){
		MessageBox(NULL,TEXT("创建窗口失败!"),TEXT("标题"), MB_OKCANCEL );
		return -1;
	}


	ShowWindow(hWnd,SW_SHOW);
	UpdateWindow(hWnd);


	MSG msg;

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

	return 0;
}

void RegisterClass_CLS(WNDCLASS &wndcls, const HINSTANCE hInstance)
{
	wndcls.cbClsExtra = 0;
	wndcls.cbWndExtra = 0;
	wndcls.hbrBackground = (HBRUSH)::GetStockObject(NULL_BRUSH);
	wndcls.hCursor = ::LoadCursor(NULL,IDC_ARROW);
	wndcls.hIcon = ::LoadIcon(hInstance,MAKEINTRESOURCE(IDI_ICON1));
	wndcls.hInstance = hInstance;
	wndcls.lpfnWndProc = WindowProc;
	wndcls.lpszClassName = TEXT("HellCpp");
	wndcls.lpszMenuName = NULL;
	wndcls.style  = CS_HREDRAW | CS_VREDRAW ;

}

void CreateWindow_Wnd(HWND &hWnd,const HINSTANCE hInstance)
{
	
	hWnd = CreateWindow( TEXT("HellCpp"), TEXT("win程序"),
						WS_OVERLAPPEDWINDOW,
						CW_USEDEFAULT ,CW_USEDEFAULT ,
						CW_USEDEFAULT ,CW_USEDEFAULT ,
						NULL,NULL,
						hInstance,0
						);

}

LRESULT CALLBACK WindowProc( HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam)
{


	switch (uMsg)
	{

		case WM_DESTROY:
			DestroyWindow(hwnd);
			PostQuitMessage(0);
			break;
		case WM_CREATE:
			SetTimer(hwnd, 1, 3000, NULL);
			break;
		case WM_TIMER:
			MessageBox(hwnd,"时间到!","caption",MB_OK);
			break;
			
		default:
			return DefWindowProc(hwnd,uMsg,wParam,lParam);
	}

	return 0;

}