WM_GETDLGCODE
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4/8/2010
This message is sent to the dialog box procedure associated with a control. Normally, Windows handles all arrow-key and TAB-key input to the control. By responding to the WM_GETDLGCODE message, an application can take control of a particular type of input and process the input itself.
Syntax
WM_GETDLGCODE wParam = 0;
lParam = (LPARAM)(LPMSG) lpMsg;
Parameters
- wParam
Not used.
- lpMsg
NULL if the system is performing a query, or is otherwise a pointer to an MSG structure.
Return Value
One or more of the values, indicating which type of input the application processes and described in the following table, is returned.
| Value | Description |
|---|---|
DLGC_BUTTON |
Button. |
DLGC_DEFPUSHBUTTON |
Default push button. |
DLGC_HASSETSEL |
EM_SETSEL messages. |
DLGC_RADIOBUTTON |
Radio button. |
DLGC_STATIC |
Static control. |
DLGC_UNDEFPUSHBUTTON |
Non-default push button. |
DLGC_WANTALLKEYS |
All keyboard input. |
DLGC_WANTARROWS |
Direction keys. |
DLGC_WANTCHARS |
WM_CHAR messages. |
DLGC_WANTMESSAGE |
All keyboard input (the application passes this message in the MSG structure to the control). |
DLGC_WANTTAB |
TAB key. |
The DefWindowProc function returns zero.
Remarks
Although the DefWindowProc function always returns zero in response to the WM_GETDLGCODE message, the window procedure for the predefined control classes return a code appropriate for each class.
The WM_GETDLGCODE message and the returned values are useful only with user-defined dialog box controls or standard controls modified by subclassing.
Requirements
| Header | winuser.h |
| Windows Embedded CE | Windows CE 1.0 and later |
| Windows Mobile | Windows Mobile Version 5.0 and later |