problem in calling function

[startup]

this call will change the key board layout to english

DLL.CallFunction("user32.dll", "LoadKeyboardLayoutA", "\"00000401\", 1", DLL_RETURN_TYPE_LONG, DLL_CALL_STDCALL) 

no problem here
the problem
when i want to change to a hex-decimal values like
0x0c09 English (Australian)

how can i make this ??
the call

DLL.CallFunction("user32.dll", "LoadKeyboardLayoutA", "\"00000c09\", 1", DLL_RETURN_TYPE_LONG, DLL_CALL_STDCALL) 

make no result
also if i convert to decimal

DLL.CallFunction("user32.dll", "LoadKeyboardLayoutA", "\"00003081\", 1", DLL_RETURN_TYPE_LONG, DLL_CALL_STDCALL) 

the call has no result

what i do wrong ??

[Nickj]

Surely you just need to flip the screen display (from a UK perspective that is).

Is the keyboard map actually loaded on the machine? I'd imagine that it's available by default as a general mapping schema but maybe not for a specific key layout.. laptop Vs full keyboard or say my logitech programmable