GUI app and winAPI calls

[mnrvovrfc]

all handles must be _OFFSET ..why ..in other windows compilers there are INTEGER or LONG
why is in QB64 pointer?

It was a half-successful attempt to ease the life of the programmer moving from 32-bit to 64-bit. A pointer isn't supposed to be dictated by what's its size. Remember that _OFFSET and _MEM are necessary in QB64(PE) because otherwise it would have to look like Freebasic or Purebasic which, in turn, look the most like C and C++.

I guess in this case use ConvertOffset&&() function that Steve wrote and is in QB64 Wiki. But that returns _INTEGER64 and not INTEGER or LONG. INTEGER is always 16-bit integer in QuickBASIC and descendants, shouldn't be discussed any longer in systems programming.