Is it necessary to convert string to WideString in Delphi?

Question

I found a Windows API function that performs \"natural comparison\" of strings. It is defined as follows:

int StrCmpLogicalW(
    LPCWSTR psz1,
    LPCWSTR p         


        

Answer 1

Keep in mind that casting a string to a WideString will convert it using default system codepage which may or may not be what you need. Typically, you'd want to use current user's locale.

From WCharFromChar in System.pas:

Result := MultiByteToWideChar(DefaultSystemCodePage, 0, CharSource, SrcBytes,
  WCharDest, DestChars);

You can change DefaultSystemCodePage by calling SetMultiByteConversionCodePage.