Windows API - Win32
A core set of Windows application programming interfaces (APIs) for desktop and server applications. Previously known as Win32 API.
2,523 questions
GetKeyboardLayout() and LoadKeyboardLayout() difficulty
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Ioann
61
Reputation points
Hello guys,
What i want to do is GetKeyboardlayout(0) that returns a HKL object and i want to use this HKL as input for the first parameter of LoadKeyboardLayout() which is LPCWSTR. Is this possible ?
Thanks in advance
Windows API - Win32
C++
C++
A high-level, general-purpose programming language, created as an extension of the C programming language, that has object-oriented, generic, and functional features in addition to facilities for low-level memory manipulation.
3,636 questions
{count} votes
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RLWA32 43,306 Reputation points2022-01-29T10:36:34.657+00:00 From a cursory test it doesn't appear that there is a direct correlation between the HKL returned from GetKeyboardLayout(0) and the input locale identifier name parameter passed to LoadKeyboardLayout. GetKeyboardLayoutName returns a copy of the string passed to LoadKeyboardLayout.
On my US-English keyboard the default value returned by GetKeyboardLayoutName was string "00000409" while the HKL returned from GetKeyboardLayout(0) was 0x04090409 (32-bit) test. After changing the keyboard layout to US-Dvorak by passing string "00010409" to LoadKeyboardLayout the HKL returned by GetKeyboardLayout was 0xF0020409.
So on the surface, it doesn't seem like the HKL would be a suitable parameter to pass to LoadKeyboardLayout.
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Ioann 61 Reputation points
2022-01-29T10:50:47.31+00:00 Is it possible to convert is somehow to be usable within LoadKeyboardLayout ?
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Viorel 114.7K Reputation points2022-01-29T11:37:18.197+00:00 Maybe you can use an approximation:
HKL h = GetKeyboardLayout( 0 ); WORD w = LOWORD( DWORD_PTR( h )); WCHAR n[KL_NAMELENGTH]; swprintf_s( n, L"%08X", w ); . . . HKL h2 = LoadKeyboardLayoutW( n, 0 );Do you want to duplicate the HKL for some different process?
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RLWA32 43,306 Reputation points
2022-01-29T11:55:19.55+00:00 The low word of the HKL will provide language but that approximation does not provide for the physical layout. Using the example that I mentioned earlier passing the approximation based on language alone could reset the physical layout of the keyboard, probably an unintended side effect.
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RLWA32 43,306 Reputation points
2022-01-29T12:00:21.27+00:00 Also, there are keyboard identifiers documented at windows-language-pack-default-values for which the high order word is not 0x0000.
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Igor Tandetnik 1,106 Reputation points2022-01-29T15:18:08.737+00:00 Why do you want to load a keyboard layout that is already loaded, that you already have a handle for? This sounds like an XY problem. What are you really trying to achieve?
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