/// <summary>
/// Sends text as keyboard input to the operating system, character by character.
/// </summary>
/// <remarks>
/// Use '\r' characters to send enter key strokes. The character '\n' is ignored.
/// </remarks>
/// <param name="text">The text to send.</param>
public static void SendKeyboardInput(string text)
{
// create input structs for normal texts
var textInputs = new Win32.INPUT[2];
// create two keyboard inputs
var firstInput = new Win32.INPUT();
firstInput.type = Win32.Constants.INPUT_KEYBOARD;
firstInput.ki = new Win32.KEYBDINPUT();
firstInput.ki.dwFlags = Win32.Constants.KEYEVENTF_UNICODE;
textInputs[0] = firstInput;
var secondInput = new Win32.INPUT();
secondInput.type = Win32.Constants.INPUT_KEYBOARD;
secondInput.ki = new Win32.KEYBDINPUT();
secondInput.ki.dwFlags = Win32.Constants.KEYEVENTF_UNICODE | Win32.Constants.KEYEVENTF_KEYUP;
textInputs[1] = secondInput;
// create input structs for special/control chars
var controlCharsInput = new Win32.INPUT[2];
// create two keyboard inputs
var firstControlCharInput = new Win32.INPUT();
firstControlCharInput.type = Win32.Constants.INPUT_KEYBOARD;
firstControlCharInput.ki = new Win32.KEYBDINPUT();
firstControlCharInput.ki.dwFlags = Win32.Constants.KEYEVENTF_SCANCODE;
controlCharsInput[0] = firstControlCharInput;
var secondControlCharInput = new Win32.INPUT();
secondControlCharInput.type = Win32.Constants.INPUT_KEYBOARD;
secondControlCharInput.ki = new Win32.KEYBDINPUT();
secondControlCharInput.ki.dwFlags = Win32.Constants.KEYEVENTF_SCANCODE | Win32.Constants.KEYEVENTF_KEYUP;
controlCharsInput[1] = secondControlCharInput;
// for each character, send input
for (int i = 0; i < text.Length; i++)
{
// treat special characters differently:
// send a keyboard scan code for the enter key for each \r character
if (text[i] == '\r')
{
controlCharsInput[0].ki.wScan = 0x1c;
controlCharsInput[1].ki.wScan = 0x1c;
Win32.SendInput(2, controlCharsInput, Marshal.SizeOf(firstControlCharInput));
continue;
}
else if (text[i] == '\n')
{
// ignore this, because we've already processed \r
// note: this logic doesn't work for *nix-like input that only sends \n
continue;
}
// send the unicode character
textInputs[0].ki.wScan = text[i];
textInputs[1].ki.wScan = text[i];
Win32.SendInput(2, textInputs, Marshal.SizeOf(firstInput));
}
}
private static void SendMouseInput(Win32.MOUSEINPUT mouseInput)
{
// create an input structure
Win32.INPUT input = new Win32.INPUT();
input.type = Win32.Constants.INPUT_MOUSE;
input.mi = mouseInput;
// send
uint result = Win32.SendInput(1, new[] { input }, Marshal.SizeOf(input));
// check for errors
var lastError = Win32.GetLastError();
if (lastError != 0)
{
throw new Exception("Error while sending mouse input: " + lastError);
}
}
