自已动手写控件 我第一次学习写自定义控件

　　一直都是用系统的控件, 还从不知道一个控件该怎么去写~~~

　　网上的教程太少了, 完全不知道怎么开头~~

　　也一直用 RegisterClassEx + CreateWindowEx 创建一个主程序窗口, 却从不知道控件也是通过这种方式来写的.
看来我们无时无刻不在自己写控件啊~~~

　　第1次写控件, 介绍一下我写的这个简单功能控件的创建过程:
　　　　1. 为控件写一个窗口类,指定默认窗口函数,并注册窗口类
　　　　2. 调用 CreateWindowEx 创建该子控件即可, 和创建主窗口完全一样
　　
　　重点:
　　　　指定的窗口过程必须要为自己的子控件做好相应的消息处理:比如:鼠标消息, WM_PAINT等~~~

　　汗, 第1次写这种东西, 没有什么经验, 也没有什么好说的, 就给和我一样不会写控件的一个示范吧, 贴代码, 不多说~~~

　　实现的功能是:当点击控件时, 控件的背景颜色会发生变化~~~
　　
　　没什么特别的意义, 只是想告诉不会写控件的大家, 该怎样开始写一个控件~~~

// TestControl.c
#include <windows.h>

LRESULT CALLBACK ControlWindowProc(HWND hWnd,UINT uMsg,WPARAM wParam,LPARAM lParam);

void RegisterControlClass(HINSTANCE hInstance)
{
    WNDCLASSEXW wce={0};

    wce.cbSize = sizeof(wce);
    wce.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    wce.hInstance = hInstance;
    wce.lpfnWndProc = ControlWindowProc;
    wce.lpszClassName = L"ControlClass";
    wce.style = CS_HREDRAW|CS_VREDRAW;

    RegisterClassExW(&wce);

}
 


LRESULT CALLBACK ControlWindowProc(HWND hWnd,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
    static HBRUSH hbrBlack,hbrRed;
    switch(uMsg)
    {
    case WM_CREATE:
        {
            hbrBlack = CreateSolidBrush(RGB(0,0,0));
            hbrRed = CreateSolidBrush(RGB(255,0,0));

            return 0;
        }
    case WM_PAINT:
        {
            PAINTSTRUCT ps;
            HDC hdc;
            
            hdc = BeginPaint(hWnd,&ps);
            SelectObject(hdc,hbrBlack);
            Rectangle(hdc,0,0,100,50);
            EndPaint(hWnd,&ps);
            return 0;

        }
    case WM_LBUTTONDOWN:
        {
            HDC hdc;
            hdc = GetDC(hWnd);
            SelectObject(hdc,hbrRed);
            Rectangle(hdc,0,0,100,50);
            SetTextColor(hdc,RGB(255,0,0));
            TextOutW(hdc,10,10,L"测试控件",4);
            ReleaseDC(hWnd,hdc);
            SetCapture(hWnd);
            return 0;
        }
    case WM_LBUTTONUP:
        {
            HDC hdc;
            hdc = GetDC(hWnd);
            SelectObject(hdc,hbrBlack);
            Rectangle(hdc,0,0,100,50);
            SetTextColor(hdc,RGB(0,0,0));
            TextOutW(hdc,10,10,L"测试控件",4);
            ReleaseDC(hWnd,hdc);
            ReleaseCapture();
            return 0;
        }
    case WM_DESTROY:
        DeleteObject(hbrBlack);
        DeleteObject(hbrRed);
        return 0;
    }
    return DefWindowProcW(hWnd,uMsg,wParam,lParam);
}


LRESULT CALLBACK MainWindowProc(HWND hWnd,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
    switch(uMsg)
    {
    case WM_CREATE:
        {
            HINSTANCE hInstance = GetModuleHandleW(NULL);

            CreateWindowExW(0,L"Button",L"按键",WS_CHILD|WS_VISIBLE,0,0,100,50,hWnd,(HMENU)101,hInstance,NULL);
            CreateWindowExW(0,L"ControlClass",L"哈哈",WS_CHILD|WS_VISIBLE,200,200,100,50,hWnd,(HMENU)100,hInstance,NULL);
            CreateWindowExW(0,L"ControlClass",L"呵呵",WS_CHILD|WS_VISIBLE,400,400,100,50,hWnd,(HMENU)102,hInstance,NULL);

            return 0;
        }
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    default:
        break;
    }
    return DefWindowProcW(hWnd,uMsg,wParam,lParam);
}

int WINAPI wWinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPWSTR lpCmdLine,int nShowCmd)
{
    HWND hWnd;
    WNDCLASSEXW wce = {0};
    MSG msg;

    RegisterControlClass(hInstance);

    wce.cbSize = sizeof(wce);
    wce.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    wce.hCursor = LoadCursor(NULL,IDC_ARROW);
    wce.hIcon = LoadIcon(NULL,IDI_APPLICATION);
    wce.hInstance = hInstance;
    wce.lpfnWndProc = MainWindowProc;
    wce.lpszClassName = L"MyWindowClass";
    wce.style = CS_HREDRAW|CS_VREDRAW;

    RegisterClassExW(&wce);

    hWnd = CreateWindowExW(0,L"MyWindowClass",L"测试",WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,NULL,NULL,hInstance,NULL);

    UpdateWindow(hWnd);
    ShowWindow(hWnd,nShowCmd);

    while(GetMessageW(&msg,NULL,0,0))
    {
        TranslateMessage(&msg);
        DispatchMessageW(&msg);
    }   
    return 0;
}

有图有真相, 字体有点丑, 不过将就, 系统默认字体都这样:
　　

女孩不哭 @ 2013-05-16 02:47:56 @ http://www.cnblogs.com/nbsofer