GUI app and winAPI calls

[aurel]

Make sure all your handles are OFFSETs.

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

and also when i try to copy code
original author made  this  as className ..what is that

hw = CreateWindowEx(0, at AND &HFFFF~&, _OFFSET(t1), WS_OVERLAPPEDWINDOW , 200, 200, 800, 600, 0, 0, hi, 0)