4.1 图标资源 光标资源

#include 
#include "resource.h"
HINSTANCE g_hInstance = 0;
LRESULT CALLBACK WndProc(HWND hWnd, UINT msgID, WPARAM wParam, LPARAM lParam)
{
    switch (msgID)
    {
    case WM_SETCURSOR:        
        {
            HCURSOR hCur = LoadCursor(g_hInstance, (char*)IDC_CURSOR2);
            if (LOWORD(lParam) == HTCLIENT)
            {//客户区
                SetCursor(hCur);
            }
            else//非客户区
            {
            }
            
        }
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    }
    return DefWindowProc(hWnd, msgID, wParam, lParam);
}
//入口函数
int CALLBACK WinMain(HINSTANCE hIns, HINSTANCE hPreIns, LPSTR IpCmdLine, int nCmdShow)
{
    g_hInstance = hIns;
    //注册窗口类
    WNDCLASS wc = { 0 };
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    wc.hCursor = LoadCursor(hIns,(char*)IDC_CURSOR1);
    wc.hIcon = LoadIcon(hIns,(char*)IDI_ICON1);
    //wc.hIcon = NULL;
    wc.hInstance = hIns;
    wc.lpfnWndProc = WndProc;
    wc.lpszClassName = "Main";
    wc.lpszMenuName = NULL;
    wc.style = CS_HREDRAW | CS_VREDRAW;
    RegisterClass(&wc);
    //在内存创建窗口
    HWND hWnd = CreateWindowEx(0, "Main", "window", WS_OVERLAPPEDWINDOW, 100, 100, 500, 500, NULL, NULL, hIns, NULL);
    //显示窗口
    ShowWindow(hWnd, SW_SHOW);
    UpdateWindow(hWnd);
    //消息循环
    MSG nMsg = { 0 };
    while (GetMessage(&nMsg, NULL, 0, 0))
    {
        TranslateMessage(&nMsg);
        DispatchMessage(&nMsg);//将消息给窗口处理函数来处理
    }
    return 0;
}

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