API function: ASC () cannot be found? what reason? Master!

apple_058

You still haven't explained clearly
First of all, there is no API called ASC
If you learned the function from VB
Do you want to "return the character value (ASCII value) of the first letter of the string"
Function of

If you don’t want any ASC "function" at all
See if it is a mistake, accidentally covered the name of the function, wrong