DialogBox
The DialogBox
macro creates a modal dialog box from a dialog box template resource. DialogBox
does not return control until the specified callback function terminates the
modal dialog box by calling the EndDialog function. The DialogBox macro uses the DialogBoxParam function.
int DialogBox(
|
HINSTANCE hInstance, |
// handle to
application instance |
|
LPCTSTR lpTemplate, |
// identifies
dialog box template |
|
HWND hWndParent, |
// handle to owner
window |
|
DLGPROC lpDialogFunc |
// pointer to
dialog box procedure |
|
); |
|
Parameters
hInstance
Identifies an
instance of the module whose executable file contains the dialog box template.
lpTemplate
Identifies
the dialog box template. This parameter is either the pointer to a
null-terminated character string that specifies the name of the dialog box
template or an integer value that specifies the resource identifier of the
dialog box template. If the parameter specifies a resource identifier, its
high-order word must be zero and its low-order word must contain the
identifier. You can use the MAKEINTRESOURCE macro to create this value.
hWndParent
Identifies
the window that owns the dialog box.
lpDialogFunc
Points to the
dialog box procedure. For more information about the dialog box procedure, see
the DialogProc
callback function.
Return Values
If the
function succeeds, the return value is the nResult parameter in the call
to the EndDialog function used to terminate the dialog box.
If the
function fails, the return value is -1.
Remarks
The DialogBox
macro uses the CreateWindowEx function to create the dialog box. DialogBox
then sends a WM_INITDIALOG message (and a WM_SETFONT message if the template
specifies the DS_SETFONT style) to the dialog box procedure. The function
displays the dialog box (regardless of whether the template specifies the
WS_VISIBLE style), disables the owner window, and starts its own message loop
to retrieve and dispatch messages for the dialog box.
When the
dialog box procedure calls the EndDialog function, DialogBox
destroys the dialog box, ends the message loop, enables the owner window (if
previously enabled), and returns the nResult parameter specified by the
dialog box procedure when it called EndDialog.
Windows
95: The system can support a maximum
of 16,364 window handles.
See Also