DialogProc
The DialogProc
function is an application-defined callback function that processes messages
sent to a modal or modeless dialog box.
BOOL CALLBACK DialogProc(
|
HWND hwndDlg, |
// handle to dialog
box |
|
UINT uMsg, |
// message |
|
WPARAM wParam, |
// first message
parameter |
|
LPARAM lParam |
// second message
parameter |
|
); |
|
Parameters
hwndDlg
Identifies
the dialog box.
uMsg
Specifies the
message.
wParam
Specifies
additional message-specific information.
lParam
Specifies
additional message-specific information.
Return Values
Except in
response to the WM_INITDIALOG
message, the dialog box procedure should return nonzero if it processes the
message, and zero if it does not. In response to a WM_INITDIALOG message, the
dialog box procedure should return zero if it calls the SetFocus function to set the focus
to one of the controls in the dialog box. Otherwise, it should return nonzero,
in which case the system sets the focus to the first control in the dialog box
that can be given the focus.
Remarks
You should
use the dialog box procedure only if you use the dialog box class for the
dialog box. This is the default class and is used when no explicit class is
specified in the dialog box template. Although the dialog box procedure is
similar to a window procedure, it must not call the DefWindowProc
function to process unwanted messages. Unwanted messages are processed
internally by the dialog box window procedure.
DialogProc is a placeholder for the application-defined function
name.
See Also