Bookshelf Home | Contents | Index | PDF |
Siebel VB Language Reference > VB Language Reference > IsMissing FunctionThis standard VB function is used to determine whether an optional argument for a procedure has been supplied by the caller. SyntaxReturns-1 (TRUE) if an optional argument was not supplied by the user; 0 (FALSE) otherwise. UsageIsMissing is used in procedures that have optional arguments to find out whether the argument's value was supplied or not. ExampleThis example prints a list of uppercase characters. The quantity printed is determined by the user. If the user wants to print every character, the Function Function myfunc(Optional arg1) Sub Button_Click See Also |
Siebel VB Language Reference |