Sent to a dialog box procedure to set the keyboard focus to a different control in the dialog box.
If lParam is TRUE, this parameter identifies the control that receives the focus. If lParam is FALSE, this parameter indicates whether the next or previous control with the WS_TABSTOP style receives the focus. If wParam is zero, the next control receives the focus; otherwise, the previous control with the WS_TABSTOP style receives the focus.
The low-order word indicates how the system uses wParam. If the low-order word is TRUE, wParam is a handle associated with the control that receives the focus; otherwise, wParam is a flag that indicates whether the next or previous control with the WS_TABSTOP style receives the focus.
An application should return zero if it processes this message.
This message performs additional dialog box management operations beyond those performed by the SetFocus function WM_NEXTDLGCTL updates the default pushbutton border, sets the default control identifier, and automatically selects the text of an edit control (if the target window is an edit control).
Minimum supported client
|Windows 2000 Professional [desktop apps only]|
Minimum supported server
|Windows 2000 Server [desktop apps only]|
Build date: 11/16/2013