C语言实现键盘鼠标模拟，支持前台模拟和系统消息后台

xLeaves（xxrpa） 发布于 2023年06月29日 15:25:26

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前台模拟可以使用 SendInput 函数实现（可以实现 DirectX 级别的窗口模拟）

后台模拟使用 SendMessage 发送消息实现（适合部分窗口）

代码已经充分考虑过各个参数的构造，确保模拟的仿真性，复制粘贴即可使用：

// 构建 LParam 参数
int MakeKeyParam(int vk, int msg, int ext)
{
	int iBit0_15 = 1;
	int iBit16_23 = MapVirtualKey(vk, 0) << 16;
	int iBit24 = ext ? 0x1000000 : 0;
	int iBit25_31;
	if ( msg == WM_KEYDOWN ) { iBit25_31 = 0x0; }
	if ( msg == WM_KEYUP ) { iBit25_31 = 0xC0000000; }
	if ( msg == WM_CHAR ) { iBit25_31 = 0x20000000; }
	if ( msg == WM_SYSKEYDOWN ) { iBit25_31 = 0x20000000; }
	if ( msg == WM_SYSKEYUP ) { iBit25_31 = 0xE0000000; }
	if ( msg == WM_SYSCHAR ) { iBit25_31 = 0xE0000000; }
	return iBit0_15 | iBit16_23 | iBit24 | iBit25_31;
}

void Key_Down(HWND hWin, int vKey)
{
	if ( hWin ) {
		SendMessage(hWin, WM_KEYDOWN, vKey, MakeKeyParam(vKey, WM_KEYDOWN, FALSE));
	} else {
		INPUT ti[1];
		memset(ti, 0, sizeof(ti));
		ti[0].type = INPUT_KEYBOARD;
		ti[0].ki.dwFlags = 0;
		ti[0].ki.wVk = vKey;
		ti[0].ki.wScan = MapVirtualKey(vKey, 0);
		ti[0].ki.time = GetTickCount();
		ti[0].ki.dwExtraInfo = GetMessageExtraInfo();
		SendInput(1, ti, sizeof(INPUT));
	}
}

void Key_Up(HWND hWin, int vKey)
{
	if ( hWin ) {
		SendMessage(hWin, WM_KEYUP, vKey, MakeKeyParam(vKey, WM_KEYUP, FALSE));
	} else {
		INPUT ti[1];
		memset(ti, 0, sizeof(ti));
		ti[0].type = INPUT_KEYBOARD;
		ti[0].ki.dwFlags = KEYEVENTF_KEYUP;
		ti[0].ki.wVk = vKey;
		ti[0].ki.wScan = MapVirtualKey(vKey, 0);
		ti[0].ki.time = GetTickCount();
		ti[0].ki.dwExtraInfo = GetMessageExtraInfo();
		SendInput(1, ti, sizeof(INPUT));
	}
}

void Key_Press(HWND hWin, int vKey)
{
	if ( hWin ) {
		SendMessage(hWin, WM_KEYDOWN, vKey, MakeKeyParam(vKey, WM_KEYDOWN, FALSE));
		SendMessage(hWin, WM_KEYUP, vKey, MakeKeyParam(vKey, WM_KEYUP, FALSE));
	} else {
		INPUT ti[2];
		memset(ti, 0, sizeof(ti));
		ti[0].type = INPUT_KEYBOARD;
		ti[0].ki.dwFlags = 0;
		ti[0].ki.wVk = vKey;
		ti[0].ki.wScan = MapVirtualKey(vKey, 0);
		ti[0].ki.time = GetTickCount();
		ti[0].ki.dwExtraInfo = GetMessageExtraInfo();
		ti[1].type = INPUT_KEYBOARD;
		ti[1].ki.dwFlags = KEYEVENTF_KEYUP;
		ti[1].ki.wVk = vKey;
		ti[1].ki.wScan = MapVirtualKey(vKey, 0);
		ti[1].ki.time = GetTickCount();
		ti[1].ki.dwExtraInfo = GetMessageExtraInfo();
		SendInput(2, ti, sizeof(INPUT));
	}
}



void Mouse_Move(HWND hWin, int x, int y)
{
	if ( hWin ) {
		SendMessage(hWin, WM_MOUSEMOVE, 0, MAKELONG(x, y));
	} else {
		INPUT ti[1];
		memset(ti, 0, sizeof(ti));
		ti[0].type = INPUT_MOUSE;
		ti[0].mi.dwFlags = MOUSEEVENTF_MOVE | MOUSEEVENTF_ABSOLUTE;
		ti[0].mi.dx = ((0xFFFF / (GetSystemMetrics(SM_CXSCREEN) - 1)) * x);
		ti[0].mi.dy = ((0xFFFF / (GetSystemMetrics(SM_CYSCREEN) - 1)) * y);
		ti[0].mi.time = GetTickCount();
		ti[0].mi.dwExtraInfo = GetMessageExtraInfo();
		SendInput(1, ti, sizeof(INPUT));
	}
}

void Mouse_Whell(HWND hWin, int iVal)
{
	if ( hWin ) {
		SendMessage(hWin, WM_MOUSEWHEEL, MAKELONG(0, iVal), MAKELONG(0, 0));
	} else {
		INPUT ti[1];
		memset(ti, 0, sizeof(ti));
		ti[0].type = INPUT_MOUSE;
		ti[0].mi.dwFlags = MOUSEEVENTF_WHEEL;
		ti[0].mi.mouseData = iVal;
		ti[0].mi.time = GetTickCount();
		ti[0].mi.dwExtraInfo = GetMessageExtraInfo();
		SendInput(1, ti, sizeof(INPUT));
	}
}

void Mouse_Down(HWND hWin, int x, int y, int iBtn)
{
	if ( hWin ) {
		if ( iBtn == 1 ) {
			SendMessage(hWin, WM_RBUTTONDOWN, 0, MAKELONG(x, y));
		} else if ( iBtn == 2 ) {
			SendMessage(hWin, WM_MBUTTONDOWN, 0, MAKELONG(x, y));
		} else {
			SendMessage(hWin, WM_LBUTTONDOWN, 0, MAKELONG(x, y));
		}
	} else {
		Mouse_Move(NULL, x, y);
		INPUT ti[1];
		memset(ti, 0, sizeof(ti));
		ti[0].type = INPUT_MOUSE;
		if ( iBtn == 1 ) {
			ti[0].mi.dwFlags = MOUSEEVENTF_RIGHTDOWN;
		} else if ( iBtn == 2 ) {
			ti[0].mi.dwFlags = MOUSEEVENTF_MIDDLEDOWN;
		} else {
			ti[0].mi.dwFlags = MOUSEEVENTF_LEFTDOWN;
		}
		ti[0].mi.time = GetTickCount();
		ti[0].mi.dwExtraInfo = GetMessageExtraInfo();
		SendInput(1, ti, sizeof(INPUT));
	}
}

void Mouse_Up(HWND hWin, int x, int y, int iBtn)
{
	if ( hWin ) {
		if ( iBtn == 1 ) {
			SendMessage(hWin, WM_RBUTTONUP, 0, MAKELONG(x, y));
		} else if ( iBtn == 2 ) {
			SendMessage(hWin, WM_MBUTTONUP, 0, MAKELONG(x, y));
		} else {
			SendMessage(hWin, WM_LBUTTONUP, 0, MAKELONG(x, y));
		}
	} else {
		Mouse_Move(NULL, x, y);
		INPUT ti[1];
		memset(ti, 0, sizeof(ti));
		ti[0].type = INPUT_MOUSE;
		if ( iBtn == 1 ) {
			ti[0].mi.dwFlags = MOUSEEVENTF_RIGHTUP;
		} else if ( iBtn == 2 ) {
			ti[0].mi.dwFlags = MOUSEEVENTF_MIDDLEUP;
		} else {
			ti[0].mi.dwFlags = MOUSEEVENTF_LEFTUP;
		}
		ti[0].mi.time = GetTickCount();
		ti[0].mi.dwExtraInfo = GetMessageExtraInfo();
		SendInput(1, ti, sizeof(INPUT));
	}
}

void Mouse_Click(HWND hWin, int x, int y, int iBtn)
{
	if ( hWin ) {
		if ( iBtn == 1 ) {
			SendMessage(hWin, WM_RBUTTONDOWN, 0, MAKELONG(x, y));
			SendMessage(hWin, WM_RBUTTONUP, 0, MAKELONG(x, y));
		} else if ( iBtn == 2 ) {
			SendMessage(hWin, WM_MBUTTONDOWN, 0, MAKELONG(x, y));
			SendMessage(hWin, WM_MBUTTONUP, 0, MAKELONG(x, y));
		} else {
			SendMessage(hWin, WM_LBUTTONDOWN, 0, MAKELONG(x, y));
			SendMessage(hWin, WM_LBUTTONUP, 0, MAKELONG(x, y));
		}
	} else {
		Mouse_Move(NULL, x, y);
		INPUT ti[2];
		memset(ti, 0, sizeof(ti));
		ti[0].type = INPUT_MOUSE;
		ti[1].type = INPUT_MOUSE;
		if ( iBtn == 1 ) {
			ti[0].mi.dwFlags = MOUSEEVENTF_RIGHTDOWN;
			ti[1].mi.dwFlags = MOUSEEVENTF_RIGHTUP;
		} else if ( iBtn == 2 ) {
			ti[0].mi.dwFlags = MOUSEEVENTF_MIDDLEDOWN;
			ti[1].mi.dwFlags = MOUSEEVENTF_MIDDLEUP;
		} else {
			ti[0].mi.dwFlags = MOUSEEVENTF_LEFTDOWN;
			ti[1].mi.dwFlags = MOUSEEVENTF_LEFTUP;
		}
		ti[0].mi.time = GetTickCount();
		ti[1].mi.time = GetTickCount();
		ti[0].mi.dwExtraInfo = GetMessageExtraInfo();
		ti[1].mi.dwExtraInfo = GetMessageExtraInfo();
		SendInput(2, ti, sizeof(INPUT));
	}
}

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