GetKeyboardLayout function (Windows)

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GetKeyboardLayout function

Applies to: desktop apps only

Retrieves the active input locale identifier (formerly called the keyboard layout) for the specified thread. If the idThread parameter is zero, the input locale identifier for the active thread is returned.

Syntax

HKL WINAPI GetKeyboardLayout(
  __in  DWORD idThread
);

Parameters

idThread [in]

Type: DWORD

The identifier of the thread to query, or 0 for the current thread.

Return value

Type: HKL

The return value is the input locale identifier for the thread. The low word contains a Language Identifier for the input language and the high word contains a device handle to the physical layout of the keyboard.

Remarks

The input locale identifier is a broader concept than a keyboard layout, since it can also encompass a speech-to-text converter, an Input Method Editor (IME), or any other form of input.

Since the keyboard layout can be dynamically changed, applications that cache information about the current keyboard layout should process the WM_INPUTLANGCHANGE message to be informed of changes in the input language.

To get the KLID (keyboard layout ID) of the currently active HKL, call the GetKeyboardLayoutName. To find out if a particular KLID is loaded, call GetKeyboardLayoutList, load the keyboard with LoadKeyboardLayout, and then check to see if the HKL is the same as the one already loaded. If not, unload it after.

Requirements

Minimum supported client	Windows 2000 Professional
Minimum supported server	Windows 2000 Server
Header	Winuser.h (include Windows.h)
Library	User32.lib
DLL	User32.dll

staticpublicIntPtr getActiveKeyBoardLayout()
    {             
        int handle =0;
        handle =GetForegroundWindow();

        IntPtr i =newIntPtr(handle);
        HandleRef hr =newHandleRef(wrapper, i);
        int pid;
        GetWindowThreadProcessId(hr,out pid);

        IntPtr layout =GetKeyboardLayout(pid);

        int er =Marshal.GetLastWin32Error();
        if(er >0)
        {
            System.Console.Out.WriteLine("error "+ er.ToString());
        }

        return layout;
    }

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C# syntax

[DllImport("user32.dll", CharSet=CharSet.Auto, ExactSpelling=true)]
public static extern IntPtr GetKeyboardLayout(int dwLayout);