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第一个窗口程序

新建一个Windows Desktop空项目步骤

  1. 打开VisualStudio2022
  2. 在新建项目里选择windows Desktop Wizard
  3. 点击Creat按钮
  4. 在Application type选项中选择Desktop Application(.exe)
  5. 在Additional options中勾选Empty project
  6. 点击OK按钮
  7. 在源文件中添加一个文件命名为Demo.cpp

第一个窗口程序完整代码

Demp.cpp

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//Demp.cpp
#include "tchar.h"
#include <windows.h>

LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
	switch (uMsg)
	{
	case WM_CLOSE:
	{
		::DestroyWindow(hWnd);
	}
	break;
	case WM_DESTROY:
	{
		::PostQuitMessage(0);
	}
	break;
	}
	return DefWindowProc(hWnd, uMsg, wParam, lParam);
}
int WINAPI _tWinMain(IN HINSTANCE hInstance, IN HINSTANCE hPrevInstance, IN LPTSTR lpCmdLine, IN int nShowCmd)
{
	const TCHAR* pszClassName = _T("ITWnd");

	WNDCLASSEX  wcex;
	wcex.cbSize = sizeof(WNDCLASSEX);
	wcex.style = CS_HREDRAW | CS_VREDRAW;
	wcex.lpfnWndProc = WndProc;
	wcex.cbClsExtra = 0;
	wcex.cbWndExtra = 0;
	wcex.hInstance = hInstance;
	wcex.hIcon = (HICON)::LoadIcon(NULL, IDI_QUESTION);
	wcex.hIconSm = (HICON)::LoadIcon(NULL, IDI_QUESTION);
	wcex.hbrBackground = (HBRUSH)::GetStockObject(WHITE_BRUSH);
	wcex.hCursor = (HCURSOR)::LoadCursor(NULL, IDC_ARROW);
	wcex.lpszMenuName = NULL;
	wcex.lpszClassName = pszClassName;
	BOOL bRet = ::RegisterClassEx(&wcex);
	if (!bRet)
	{
		::MessageBox(NULL, _T("注册窗口类失败"), _T("注册窗口"), 0);
		return FALSE;
	}
	HWND hWnd = ::CreateWindowEx(0, pszClassName, _T("模仿"), WS_VISIBLE | WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 
		CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance,NULL);
	if (NULL == hWnd)
	{
		::MessageBox(NULL, _T("创建窗口失败"), _T("创建窗口"), 0);
		return FALSE;
	}

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

	MSG msg;
	while (::GetMessage(&msg, NULL, NULL, NULL))
	{
		::TranslateMessage(&msg);
		::DispatchMessageW(&msg);
	}
}