I've seen some people ask how to how to send keyboard events in .NET Compact Framework in the community. Although the operation is pretty simple, I'll share a code snippet anyway.

const int KEYEVENTF_KEYPRESS = 0x0000;
const int KEYEVENTF_KEYUP = 0x0002;
static extern void keybd_event(byte bVk, byte bScan, int dwFlags, int dwExtraInfo);
void SendKey(Keys key)
    keybd_event((byte) key, 0, KEYEVENTF_KEYPRESS, 0);
    keybd_event((byte) key, 0, KEYEVENTF_KEYUP, 0);

The code above will send the keyboard event to currently focused window or control