some functionality won't work when install my custom layouts

Question

Hi there,

• I have tried to make custom language layout for my custom keyboard, for that i have defined one structure which is mentioned below, when i install my layout all functionalities work as according to my custom configuration, control, alt, shift and all modifier keys are also working properlly, but i face issue in rename edit section of any file or directory or try to copy path of the file.
• When i use ctrl+a, ctrl+c and ctrl+v to any file, folder or text in any text editer it work fine, but when i try to rename any fille and there i use this ctrl+a, ctrl+v and ctrl+c it wont work there in my custom language layout.
• This is the VK_TO_BIT structure i used:
  
• Insted of KBDINVALID i have also tried KBDCTRL but the result is same. Also i found something from AI, please go through it and suggest me some solution.
  

Answer 1

The behavior comes from how Windows routes keyboard input and how custom layouts must describe modifier keys.

In File Explorer, Ctrl+C/Ctrl+V on a file or folder is handled at the shell level and does not depend on the character-level processing in the keyboard layout. In contrast, when renaming a file, the focus is in an edit control and copy/paste/select-all are processed using the layout’s modifier tables. If the layout does not correctly map the standard Ctrl and Shift modifiers, shortcuts like Ctrl+A/C/V will not be recognized inside edit controls.

To make these shortcuts work reliably in rename text boxes and other edit controls, the layout must:

1. Expose the standard virtual keys for modifiers (VK_CONTROL, VK_SHIFT, VK_MENU) in the modifier tables.
2. Map those standard virtual keys to the standard modifier bits (KBDCTRL, KBDSHIFT, KBDALT) in the VK_TO_BIT table.
3. Ensure that any custom modifier virtual keys are in addition to, not instead of, the standard VKs.

If VK_CONTROL is mapped to KBDINVALID (or omitted) and only custom modifier VKs (such as VK_CUSTOM_CTRL) are mapped to KBDCTRL, edit controls that expect the standard Ctrl modifier will not see Ctrl pressed, so Ctrl+A/C/V will fail there even though shell-level shortcuts still work.

The fix is to define VK_TO_BIT so that VK_CONTROL participates in the control modifier bit, for example (conceptually):

• { VK_CONTROL, KBDCTRL }
• Keep any custom modifier VKs also mapped to KBDCTRL/KBDSHIFT/KBDALT as needed, but do not replace the standard VKs.

Also verify that the rest of the layout’s modifier tables (such as MODIFIERS and VK_TO_WCHAR/VK_TO_WCHAR_TABLE) are consistent with these mappings so that character-level processing in edit controls uses the correct modifier bits.

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References:

• Keyboard Input Overview
• Hardware and software keyboards