C++ 控制台创建窗口，加载png图片，实现悬浮窗

 代码传送门

#include 
#include 
#pragma comment(lib, "gdiplus.lib")

using namespace Gdiplus;

//声明自定义消息处理函数
LRESULT CALLBACK WindowProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam);
//绘制PNG窗口
BOOL UpdateDemoWindows(Image *image);

Gdiplus::GdiplusStartupInput m_gdiplusStartupInput;
ULONG_PTR m_pGdiToken;
HWND m_hWnd;

int _tmain(int argc, _TCHAR* argv[])
{		
	GdiplusStartup(&m_pGdiToken, &m_gdiplusStartupInput, NULL);	

	HINSTANCE hInst;
	hInst = GetModuleHandle(NULL);	//获取一个应用程序或动态链接库的模块句柄	
	WNDCLASSEX wcx;	
	wcx.cbSize = sizeof(wcx);  
	wcx.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC | CS_NOCLOSE;//窗口的风格	
	wcx.lpfnWndProc = WindowProc;     //采用自定义消息处理函数
	wcx.cbClsExtra = 0;                // no extra class memory  
	wcx.cbWndExtra = 0;                // no extra window memory  
	wcx.hInstance = hInst;         //当前应用程序的实例句柄 
	wcx.hIcon = LoadIcon(NULL,IDI_APPLICATION); //图标风格		
	wcx.hCursor = LoadCursor(NULL,IDC_ARROW);  //鼠标风格
	wcx.hbrBackground = (HBRUSH)WHITE_BRUSH; //背景色
	wcx.lpszMenuName =NULL;  //菜单名	
	wcx.lpszClassName = _T("ITSMYOSDCLASS"); //窗口类的名称
	wcx.hIconSm = NULL;		

	if (!RegisterClassEx(&wcx))
	{
		printf("RegisterClassEx failed");
		return 1;
	}

	//窗口在屏幕上的显示位置
	int OSDleft = GetSystemMetrics(SM_CXSCREEN) / 2 - 300;
	int OSDTop = GetSystemMetrics(SM_CYSCREEN) / 2;

	m_hWnd = CreateWindowEx(
		WS_EX_LAYERED | WS_EX_TOOLWINDOW | WS_EX_TOPMOST | WS_EX_TRANSPARENT | WS_EX_NOACTIVATE,//窗口的扩展风格
		wcx.lpszClassName,//上面注册的类名lpszClassName，要完全一致  
		NULL,
		WS_VISIBLE | WS_POPUP,//窗口的风格
		OSDleft,//窗口相对于父级的X坐标  
		OSDTop,//窗口相对于父级的Y坐标 
		300,//窗口的宽度  
		300,//窗口的高度 
		(HWND)NULL,//没有父窗口，为(HWND)NULL//GetDesktopWindow(),
		(HMENU)NULL,//没有菜单，为NULL  
		hInst,//当前应用程序的实例句柄  
		(LPVOID)NULL);	//没有附加数据，为NULL  

	if (!m_hWnd)
	{
		printf("CreateWindowEx failed");
		return 1;
	}	
	Image* pImage = Image::FromFile(L"demo.png");	
	if (pImage->GetLastStatus() == Ok)
	{
		UpdateDemoWindows(pImage);
	}	
	delete pImage;
	pImage = NULL;
	//消息循环  
	MSG msg;
	while (GetMessage(&msg, (HWND)NULL, 0, 0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	Gdiplus::GdiplusShutdown(m_pGdiToken);	

	return 0;
}