valtoval - convert to numeric value
These functions are merely stubs which return their arguments.
The conversions they purport to perform actually occur just prior
to the function call in the main BASIC program module. The
compiler determines that in order to pass the arguments to these
functions, they must have the appropriate types. Most BASIC functions
do not have type restrictions although the C language is not so
flexible. Therefore in general the compiler provides for the
conversion of types in order to pass arguments to library
functions. The degenerate condition of these functions is due
to this compensatory facility of the compiler.
These functions implement the BASIC CDBL, CSNG and
cdbl(func), csng(func), cint(func)
The Basmark QuickBASIC Programmerís Manual