IInputPreTranslateKeyboardSourceHandler::OnTreeMessage method (microsoft.ui.input.inputpretranslatesource.interop.h)

Handles keyboard input messages for pre-translate processing on elements without current focus.

Syntax

HRESULT OnTreeMessage(
  [in]      IInputPreTranslateKeyboardSourceInterop *source,
  [in]      const MSG                               *msg,
  [in]      UINT                                    keyboardModifiers,
  [in, out] bool                                    *handled
);

Parameters

[in] source

The keyboard input source.

[in] msg

The keyboard input message.

[in] keyboardModifiers

The collection of keyboard modifiers.

These are are a combination of flags that can hold the following values:

FVIRTKEY 0x0001 Message is WM_(SYS)KEYDOWN or WM_(SYS)KEYUP. FSHIFT 0x0004 VK_SHIFT is pressed. FCONTROL 0x0008 VK_CONTROL is pressed (or VK_RCONTROL when the AltGr key is present and pressed). FALT 0x0010 VK_MENU is pressed (or VK_LMENU when the AltGr key is present and pressed).

[in, out] handled

True, if message handled. Otherwise, false.

Return value

This function has no return value.

Requirements

See also

OnDirectMessage function