[Umaid123]

 i m making virtual keyboard for that reaseon i just want to ask that how to represent e.g

#define tab 0x02				  // header file of c++

i want to represent it in delphi programming which is object pascal

[JackOfAllTrades]

Well, 0x02 is the hexadecimal equivalent of the decimal number 2, and #define uses the C/C++ preprocessor to substitute 0x02 for all instances of "tab" in the code to be compiled.

So based on this page, I would suggest defining tab to be a constant like this I guess:

const
    TAB = 2;