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DialogBox info  Overview  Group

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. To get extended error information, call GetLastError.

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

CreateDialog, CreateWindowEx, DialogBoxIndirect, DialogBoxIndirectParam, DialogBoxParam, DialogProc, EndDialog, MAKEINTRESOURCE, WM_INITDIALOG, WM_SETFONT

See also:


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