Want to get input from Keyboard using windows api's

Question

I want to get the keyboard input (single) using windows api's

i have two found option 1. keybd_event() of user32.dll

VOID WINAPI keybd_event(
  _In_  BYTE bVk,
  _In_  BYTE bScan,
  _In_  DWORD dwFlags,
  _In_  ULONG_PTR dwExtraInfo
);

2 SendInput() of user32.dll

UINT WINAPI SendInput(
  _In_  UINT nInputs,
  _In_  LPINPUT pInputs,
  _In_  int cbSize
);

i want to import them in my WPF app which one should i go after ??

Answer 1

Two alternatives.

RegisterHotKey

// Registers a hot key with Windows.
[DllImport(“user32.dll”)]
private static extern bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, uint vk);
// Unregisters the hot key with Windows.
[DllImport(“user32.dll”)]
private static extern bool UnregisterHotKey(IntPtr hWnd, int id);

Since you are targeting WPF you would also need to add a WndProc to your HwndSource .

More information in this question: How to handle WndProc messages in WPF?

SetWindowsHookEx

[DllImport("user32.dll", SetLastError = true)]
static extern IntPtr SetWindowsHookEx(HookType hookType, HookProc lpfn, IntPtr hMod, uint dwThreadId);
[DllImport("user32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool UnhookWindowsHookEx(IntPtr hhk);

More information from PInvoke.net: SetWindowsHookEx (user32)