HWND CreateDialog( HINSTANCE hInstance,
LPCTSTR lpTemplate,
HWND hWndParent,
DLGPROC lpDialogFunc
);

Parameters

hInstance
[in] Handle to the module whose executable file contains the dialog box template.
lpTemplate
[in] Specifies 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
[in] Handle to the window that owns the dialog box.
lpDialogFunc
[in] Pointer to the dialog box procedure. For more information about the dialog box procedure, see DialogProc.

if (DialogBox(hinst,
MAKEINTRESOURCE(DLG_DELETEITEM),
hwnd, (DLGPROC)DeleteItemProc)==IDOK)
{

// Complete the command; szItemName contains the
// name of the item to delete.

}

hwndGoto = CreateDialog(hinst,
MAKEINTRESOURCE(DLG_GOTO),
hwnd, (DLGPROC) GoToProc);
ShowWindow(hwndGoto, SW_SHOW);