PWideChar is used most often as a parameter type for DLLs written in C or C++, such as the Windows API.

You can treat a PWideChar pointer as a pointer to an array of WideChar. The array index is an Integer subrange, starting from zero. Delphi does not provide any bounds checking for the array. The convention is that the end of the string is denoted by the presence of the #0 character.

Perform pointer arithmetic on a PWideChar pointer by adding and subtracting integers similar to the way the Inc and Dec procedures work.

Delphi’s extended syntax is enabled by default. Use the $X or $ExtendedSyntax compiler directive to disable this feature and revert to behavior closer to standard Pascal.