向画图应用程序发送点击事件

Sending a click event to a Paint application

我正在编写一个应用程序,可以根据用户的喜好自动在 canvas 上绘制内容。 对于初学者,如何向 MS Paint 应用程序发送 click 事件

您必须搜索 google 以了解如何将 windows 消息发送到不同的应用程序。鼠标点击由 2 条不同的消息组成:WM_LBUTTONDOWN 和 WM_LBUTTONUP.

http://stefanstools.sourceforge.net/SendMessage.html http://www.codeproject.com/Articles/137/Sending-a-message-to-the-Main-Frame-Window-of-Anot

首先,您需要找到画图应用程序:

static HWND findMSPaintDrawWindow(void)
{
    HWND target;
    target = FindWindow(TARGET_PAINT_WINDOW, NULL);
    if (NULL != target)
    {
        target = FindWindowEx(target, NULL, TARGET_PAINT_INPUT_SUBWINDOW, NULL);

        if (NULL != target)
        {
            target = FindWindowEx(target, NULL, NULL, NULL);
        }
    }

    if (/*ENABLE_DEBUG_CONSOLE*/ 0)
    {
        char name[256];
        GetClassName(target, name, 255);
        printf("Detected ms paint Draw area with name [%s]\n", name);
    }

    return target;
}

其次,你与它互动:

static void sendMouseButton(int buttonState)
{
    HWND target;
    UINT buttonMode = WM_LBUTTONUP;

    target = findMSPaintDrawWindow();
    if (target)
    {
        if (buttonState)
        {
            buttonMode = WM_LBUTTONDOWN;
            g_MouseDown = 0;
        }
        printf("INFO: Mouse [%d] msg %d\n", buttonState, buttonMode);
        PostMessage(target, buttonMode, MK_LBUTTON, X, Y));
    }

}

您可以随时浏览 MSDN 文档以获取更多详细信息。