hwndParent (HWND) - input

The parent window handle of the secondary window to be created.

hwndOwner (HWND) - input

The owner-window handle of the secondary window to be created.

pszText (PSZ) - input

The text of the message to be displayed.

pszCaption (PSZ) - input

The title of the secondary message box window.

idWindow (ULONG) - input

The identifier of the secondary message box window.

psmbinfo (PSMBINFO) - input

This is an information block that defines which buttons must be included in the window.

rc (ULONG) - returns

Returns the result passed to WinDismissSecondaryWindow; this is the ID of the button that was clicked.