windows编程学习之路--自绘按钮

//直接上代码吧，不过这些代码仅供参考：

// DrawButton.cpp : 定义应用程序的入口点。//#include "stdafx.h"#include "DrawButton.h"#pragma comment(lib,"Msimg32.lib")#define MAX_LOADSTRING 100// 全局变量: HINSTANCE hInst; // 当前实例TCHAR szTitle[MAX_LOADSTRING]; // 标题栏文本TCHAR szWindowClass[MAX_LOADSTRING]; // 主窗口类名// 此代码模块中包含的函数的前向声明: ATOM MyRegisterClass(HINSTANCE hInstance);BOOL InitInstance(HINSTANCE, int);LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);INT_PTR CALLBACK About(HWND, UINT, WPARAM, LPARAM);int APIENTRY _tWinMain(_In_ HINSTANCE hInstance,_In_opt_ HINSTANCE hPrevInstance,_In_ LPTSTR lpCmdLine,_In_ int nCmdShow){UNREFERENCED_PARAMETER(hPrevInstance);UNREFERENCED_PARAMETER(lpCmdLine);// TODO: 在此放置代码。MSG msg;HACCEL hAccelTable;// 初始化全局字符串LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);LoadString(hInstance, IDC_DRAWBUTTON, szWindowClass, MAX_LOADSTRING);MyRegisterClass(hInstance);// 执行应用程序初始化: if (!InitInstance (hInstance, nCmdShow)){return FALSE;}hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_DRAWBUTTON));// 主消息循环: while (GetMessage(&msg, NULL, 0, 0)){if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg)){TranslateMessage(&msg);DispatchMessage(&msg);}}return (int) msg.wParam;}LRESULT CALLBACK MyBtnWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam){PAINTSTRUCT ps;HDC hdc;HDC hMemDC;HBITMAP hBmp;RECT rect;::GetClientRect(hWnd, &rect);switch (message){case WM_CREATE:break;case WM_PAINT:InvalidateRect(hWnd, &rect, TRUE);hdc = BeginPaint(hWnd, &ps);hMemDC = CreateCompatibleDC(hdc);//加载图片,自己的工程目录当中应该有test1.bmp这张图片,我这里就随便绘制一个图片的按钮，鼠标离去或进来还可以进行切换hBmp = (HBITMAP)LoadImageA(NULL, "test1.bmp", IMAGE_BITMAP, 40, 40, LR_LOADFROMFILE);SelectObject(hMemDC, hBmp);TransparentBlt(hdc, 0, 0, rect.right - rect.left, rect.bottom - rect.top, hMemDC, 0, 0, 40, 40, RGB(0, 0, 0));DeleteObject(hMemDC);EndPaint(hWnd, &ps);break;case WM_MOUSEMOVE:TRACKMOUSEEVENT tme;tme.cbSize = sizeof(tme);tme.hwndTrack = hWnd;tme.dwFlags = TME_LEAVE | TME_HOVER;tme.dwHoverTime = 1;//发送WM_MOUSEHOVER或WM_MOUSELEAVETrackMouseEvent(&tme);break;case WM_MOUSEHOVER: InvalidateRect(hWnd, &rect, TRUE);hdc = BeginPaint(hWnd, &ps);// TODO: 在此添加任意绘图代码...// 双缓冲绘图，若不懂双缓冲的可以看一下我的另外一篇关于双缓冲的博客hMemDC = CreateCompatibleDC(hdc);hBmp = (HBITMAP)LoadImageA(NULL, "test2.bmp", IMAGE_BITMAP, 40, 40, LR_LOADFROMFILE);SelectObject(hMemDC, hBmp);TransparentBlt(hdc, 0, 0, rect.right - rect.left, rect.bottom - rect.top, hMemDC, 0, 0, 40, 40, RGB(0, 0, 0));DeleteObject(hMemDC);EndPaint(hWnd, &ps);break;case WM_MOUSELEAVE: InvalidateRect(hWnd, &rect, TRUE);hdc = BeginPaint(hWnd, &ps);// TODO: 在此添加任意绘图代码...hMemDC = CreateCompatibleDC(hdc);hBmp = (HBITMAP)LoadImageA(NULL, "test1.bmp", IMAGE_BITMAP, 40, 40, LR_LOADFROMFILE);SelectObject(hMemDC, hBmp);TransparentBlt(hdc, 0, 0, rect.right - rect.left, rect.bottom - rect.top, hMemDC, 0, 0, 40, 40, RGB(0, 0, 0));DeleteObject(hMemDC);EndPaint(hWnd, &ps);break;//我一般不处理按键按下的消息，我觉得按键按下可能会有多次，但弹起只有一次，所以处理WM_LBUTTONUP更好一点case WM_LBUTTONDOWN:break;case WM_LBUTTONUP:MessageBox(hWnd, L"This is a test!", 0, 0);//对于自己绘制的控件，在自己的窗口回调函数中一般来转发消息，将消息传递给主窗口处理，为了方便我这里就随便发送一个消息过去，自己写时，应根据自己的需求来转发消息。SendMessage(GetParent(hWnd), WM_COMMAND, wParam, lParam);break;case WM_COMMAND:SendMessage(GetParent(hWnd), WM_COMMAND, wParam, lParam);default:return DefWindowProc(hWnd, message, wParam, lParam);}return 0;}BOOL RegisterMyBtnClass(){WNDCLASSEX wcex;wcex.cbSize = sizeof(WNDCLASSEX);wcex.style = CS_PARENTDC | CS_GLOBALCLASS; //注意这里应该要指定这两个风格，使其可以在父窗口上绘制和该窗口类可以在全局可以调用wcex.lpfnWndProc = MyBtnWndProc;wcex.cbClsExtra = 0;wcex.cbWndExtra = 0;wcex.hInstance = hInst;wcex.hIcon = LoadIcon(hInst, MAKEINTRESOURCE(IDI_DRAWBUTTON));wcex.hCursor = LoadCursor(NULL, IDC_HAND);wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);wcex.lpszMenuName = 0;wcex.lpszClassName = L"MyBtn";wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_DRAWBUTTON));RegisterClassEx(&wcex);return TRUE;}//// 函数: MyRegisterClass()//// 目的: 注册窗口类。//ATOM MyRegisterClass(HINSTANCE hInstance){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 = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_DRAWBUTTON));wcex.hCursor = LoadCursor(NULL, IDC_ARROW);wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);wcex.lpszMenuName = MAKEINTRESOURCE(IDC_DRAWBUTTON);wcex.lpszClassName = szWindowClass;wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));//这里应该调用一下我们自己控件的注册窗口类函数RegisterMyBtnClass();return RegisterClassEx(&wcex);}//// 函数: InitInstance(HINSTANCE, int)//// 目的: 保存实例句柄并创建主窗口//// 注释: //// 在此函数中，我们在全局变量中保存实例句柄并// 创建和显示主程序窗口。//BOOL InitInstance(HINSTANCE hInstance, int nCmdShow){HWND hWnd;hInst = hInstance;hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);if (!hWnd){return FALSE;}ShowWindow(hWnd, nCmdShow);UpdateWindow(hWnd);return TRUE;}//// 函数: WndProc(HWND, UINT, WPARAM, LPARAM)//// 目的: 处理主窗口的消息。//// WM_COMMAND - 处理应用程序菜单// WM_PAINT - 绘制主窗口// WM_DESTROY - 发送退出消息并返回////LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam){int wmId, wmEvent;PAINTSTRUCT ps;HDC hdc;switch (message){case WM_CREATE://当创建主窗口的时候，也顺便创建一个自己的控件CreateWindow(L"MyBtn", L"test", WS_CHILD | WS_VISIBLE, 500, 300, 30, 30, hWnd, 0, hInst, 0);break;case WM_COMMAND:wmId = LOWORD(wParam);wmEvent = HIWORD(wParam);// 分析菜单选择: switch (wmId){case IDM_ABOUT:DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);break;case IDM_EXIT:DestroyWindow(hWnd);break;default:return DefWindowProc(hWnd, message, wParam, lParam);}break;case WM_PAINT:hdc = BeginPaint(hWnd, &ps);// TODO: 在此添加任意绘图代码...EndPaint(hWnd, &ps);break;case WM_DESTROY:PostQuitMessage(0);break;default:return DefWindowProc(hWnd, message, wParam, lParam);}return 0;}// “关于”框的消息处理程序。INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam){UNREFERENCED_PARAMETER(lParam);switch (message){case WM_INITDIALOG:return (INT_PTR)TRUE;case WM_COMMAND:if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL){EndDialog(hDlg, LOWORD(wParam));return (INT_PTR)TRUE;}break;}return (INT_PTR)FALSE;}