C# 模擬鼠標(mouse_event)

想必有不少人在項目開發中可能碰見須要作模擬鼠標點擊的小功能，不少人會在

百度事後採用mouse_event這個函數，不過我並不想討論如何去使用mouse_event

函數怎麼去使用，由於那沒有多大意義。

 

static void mouse_event(int dwFlags, int dx, int dy, int cButtons, int dwExtraInfo)
{
    int x = dx, y = dy;
    edit_position(dwFlags, dx, dy, ref x, ref y);
    IntPtr hWndFromPoint = WindowFromPoint(x, y);
    screen_to_client(hWndFromPoint, ref x, ref y);
    send_message(hWndFromPoint, dwFlags, cButtons, x, y);
}

 

上述代碼你發現了什麼？若是你發現說明你知道了本文到底在寫什麼東東 說不定你

會有一些興趣看下去，不過想到我現在混那麼悽慘 在工地上作幹活 不過也還好。

鼠標點擊目標時會向鼠標所點擊目標窗口投遞消息，根據鼠標的按鍵、狀態不一樣會

投遞不一樣的消息，一個完整的「鼠標左鍵單擊」事件過程爲「WM_LBUTTONDOWN + 

WM_LBUTTONUP」即鼠標「先左鍵按下 + 後左鍵擡起」，因爲mouse_event能夠模擬

鼠標點擊過程而不是直接性一次完整的鼠標單擊過程，因此一樣存在「按下、擡起」

 

mouse_event(MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_LEFTUP | MOUSEEVENTF_MOVE, -450, 0, 1, 0);

mouse_event在沒有提供MOUSEEVENTF_MOVE量時光標不會移動到相對位置，

 

「光標相對位置=光標現行位置+新光標位置」若是提供量「MOUSEEVENTF_ABSOLUTE」

絕對位置，則會以「新光標位置」爲準而不會添加「光標現行位置」

 

static void edit_position(int dwFlags, int dx, int dy, ref int x, ref int y)
{
    Point pos = MousePosition;
    x = x + pos.X;
    y = y + pos.Y;
    if ((dwFlags | MOUSEEVENTF_ABSOLUTE) == dwFlags)
        SetCursorPos(dx, dy);
    if ((dwFlags | MOUSEEVENTF_MOVE) == dwFlags)
        SetCursorPos(x, y);
}

 

edit_position函數主要用於對MOUSEEVENTF_MOVE於MOUSEEVENTF_ABSOLUTE

相對/絕對光標位置修改的一個支持

 

static void send_message(IntPtr hWnd, int dwFlags, int cButtons, int x, int y)
{
    if ((dwFlags | MOUSEEVENTF_LEFTDOWN) == dwFlags)
        SendMessage(hWnd, WM_LBUTTONDOWN, cButtons, MakeDWord(x, y));
    if ((dwFlags | MOUSEEVENTF_LEFTUP) == dwFlags)
        SendMessage(hWnd, WM_LBUTTONUP, cButtons, MakeDWord(x, y));
    if ((dwFlags | MOUSEEVENTF_RIGHTDOWN) == dwFlags)
        SendMessage(hWnd, WM_RBUTTONDOWN, cButtons, MakeDWord(x, y));
    if ((dwFlags | MOUSEEVENTF_RIGHTUP) == dwFlags)
        SendMessage(hWnd, WM_RBUTTONUP, cButtons, MakeDWord(x, y));
    if ((dwFlags | MOUSEEVENTF_MIDDLEDOWN) == dwFlags)
        SendMessage(hWnd, WM_MBUTTONDOWN, cButtons, MakeDWord(x, y));
    if ((dwFlags | MOUSEEVENTF_MIDDLEUP) == dwFlags)
        SendMessage(hWnd, WM_MBUTTONUP, cButtons, MakeDWord(x, y));
}

 

send_message函數主要用於模擬鼠標點擊的過程，上面我提到「先左鍵按下 + 後左鍵擡起」

在上面的代碼中你會看的清楚的不得了，若是相反你能夠去嘗試一番會有什麼後果 與其說

不如大家本身作更要來的快些。

 

static int MakeDWord(int low, int high)
{
    return low + (high * Abs(~ushort.MaxValue));
}

static int Abs(int value)
{
    return ((value >> 31) ^ value) - (value >> 31);
}

MakeDWord / 合併整數，函數主要是把兩個short合併爲一個int，分爲low、high兩部分

 

 

static bool screen_to_client(IntPtr hwnd, ref int x, ref int y)
{
    bool bRetVal = false;
    Point lpptPos = new Point(x, y);
    if ((bRetVal = ScreenToClient(hwnd, ref lpptPos)))
    {
        x = lpptPos.X;
        y = lpptPos.Y;
    }
    return bRetVal;
}

screen_to_client函數故名思意，它主要用於把屏幕上的座標轉換到窗口客戶上對應座標

 

 

public const int WM_LBUTTONDOWN = 513; // 鼠標左鍵按下
public const int WM_LBUTTONUP = 514; // 鼠標左鍵擡起
public const int WM_RBUTTONDOWN = 516; // 鼠標右鍵按下
public const int WM_RBUTTONUP = 517; // 鼠標右鍵擡起
public const int WM_MBUTTONDOWN = 519; // 鼠標中鍵按下
public const int WM_MBUTTONUP = 520; // 鼠標中鍵擡起

public const int MOUSEEVENTF_MOVE = 0x0001; // 移動鼠標
public const int MOUSEEVENTF_LEFTDOWN = 0x0002; // 鼠標左鍵按下
public const int MOUSEEVENTF_LEFTUP = 0x0004; // 鼠標左鍵擡起
public const int MOUSEEVENTF_RIGHTDOWN = 0x0008; // 鼠標右鍵按下
public const int MOUSEEVENTF_RIGHTUP = 0x0010; // 鼠標右鍵擡起
public const int MOUSEEVENTF_MIDDLEDOWN = 0x0020; // 鼠標中鍵按下
public const int MOUSEEVENTF_MIDDLEUP = 0x0040; // 鼠標中鍵擡起
public const int MOUSEEVENTF_ABSOLUTE = 0x8000; // 絕對座標

 

 

[DllImport("user32.dll", SetLastError = true)]
public static extern int SendMessage(IntPtr hWnd, int uMsg, int wParam, int lParam);

[DllImport("user32.dll", SetLastError = true)]
public static extern IntPtr WindowFromPoint(int xPoint, int yPoint);

[DllImport("user32.dll", SetLastError = true)]
public static extern int SetCursorPos(int x, int y);

[DllImport("user32.dll", SetLastError = true)]
public static extern bool ScreenToClient(IntPtr hWnd, ref Point lppt);

// [DllImport("user32", SetLastError = true)]
// public static extern int mouse_event(int dwFlags, int dx, int dy, int cButtons, int dwExtraInfo);

鼠標右鍵單擊(靜默)：

 

 

mouse_event(MOUSEEVENTF_RIGHTDOWN | MOUSEEVENTF_RIGHTUP, 0, 0, 1, 0);

 

鼠標左鍵雙擊(靜默):

 

mouse_event(MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_LEFTUP, 0, 0, 2, 0);

鼠標移動(相對位置):

 

 

mouse_event(MOUSEEVENTF_MOVE, 100, 50, 0, 0);

鼠標移動(絕對位置):

 

 

mouse_event(MOUSEEVENTF_ABSOLUTE, 100, 50, 0, 0);

好了就這麼多吧，如今渾身頭暈腦漲的 話說多了反倒很差 本身從代碼中領悟纔是真