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CBEM_HASEDITCHANGED message

  • Artikkeli

Determines whether the user has changed the text of a ComboBoxEx edit control.

Parameters

wParam

Must be zero.

lParam

Must be zero.

Return value

Returns TRUE if the text in the control's edit box has been changed, or FALSE otherwise.

Remarks

A ComboBoxEx control uses an edit box control when it is set to the CBS_DROPDOWN style. You can retrieve the edit box control's window handle by sending a CBEM_GETEDITCONTROL message.

When the user begins editing, you will receive a CBEN_BEGINEDIT notification. When editing is complete, or the focus changes, you will receive a CBEN_ENDEDIT notification. The CBEM_HASEDITCHANGED message is only useful for determining whether the text has been changed if it is sent before the CBEN_ENDEDIT notification. If the message is sent afterward, it will return FALSE. For example, suppose the user starts to edit the text in the edit box but changes focus, generating a CBEN_ENDEDIT notification. If you then send a CBEM_HASEDITCHANGED message, it will return FALSE, even though the text has been changed.

The CBS_SIMPLE style does not work correctly with CBEM_HASEDITCHANGED.

Requirements

Requirement Value
Minimum supported client
 Windows Vista [desktop apps only]
Minimum supported server
 Windows Server 2003 [desktop apps only]
Header
Commctrl.h