Thank you Robert.

fn NavDialog_SetSaveFileName( cfName )
fn NavDialog( _kNavDialogPutFile + _kNavDialogSheet, "Save This File  
As...", "", @fn MyPutFileHandler, 0 )
//CFRelease( cfName ) // Not use function
At present, the code above operates enough.

fn NavDialog_SetMessage( @"untitled.abcd" )
or
fn NavDialog_SetMessage( fn CFSTR( "untitled.abcd" ) )
The code of the two above doesn't operates.
Instead, fn NavDialog_SetSaveFileName( fn CFSTR( "untitled.abcd" ) )  
operates.

fn NavDialog_SetSaveFileName( cfName )
fn NavDialog( _kNavDialogPutFile + _kNavDialogSheet, "Save This File  
As...", "", @fn MyPutFileHandler, 0 )
CFRelease( cfName ) // Use function
The application suddenly quits in the code above when the  
superscription saving (Replace) if CFRelease() is executed.
Temporary cfName is made a global variable.

Yoshiyuki