Libraries - mkilgore/QB64pe GitHub Wiki

DLL, C++ and the Windows API Libraries Creating your own $INCLUDE Text Libraries

To create your own libraries of your favorite Basic subs and functions, just copy the QB64 code to a text file and save it as a BI or BM file. Then all you need to do is $INCLUDE the text file name after all of the SUB and FUNCTION code in the program. Once it is compiled, the text file is no longer needed. Save it for other programs you create! No more Object or QLB files to mess with either!

  • Variable DEF, DIM, SHARED, TYPE and DATA statements should be $INCLUDEd in a BI text file at the start of the program.
  • SUB and FUNCTION code should be $INCLUDEd at the very bottom of the QB64 BAS code module in a BM text file.
  • QB64 also allows TYPE declarations to be placed inside of SUB or FUNCTION procedures!
Note: QB64 requires all DLL files to either be with the program or in the C:\WINDOWS\SYSTEM32 folder!

C++ Variable Types

The following C++ variable types should be used when converting sub-procedure parameters from Libraries to QB64 variable types.

'''C Name        Description                 Size*    Signed       Range*        Unsigned'''
[[_BYTE|char]]        Character or small integer.   1 byte   -128 to 127                0 to 255
[[INTEGER|short int]]   Short Integer(Word)           2 byte   -32768 to 32767            0 to 65535
[[LONG|int]]         Integer(Dword)                4 byte   -2147483648 to 2147483647  0 to 4294967295
[[LONG|long int]]    Int32, Long integer or Long   4 byte   -2147483648 to 2147483647  0 to 4294967295
[[_INTEGER64|long long]]   Long long (Qword)             8 byte   -9223372036854775808 to 9223372036854775807
[[Boolean|bool]]        Boolean value true or false.  1 byte   true or false
[[SINGLE|float]]       Floating point number         4 byte   +/- 3.4E +/- 38 (~7 digits)
[[DOUBLE|double]]	    Double precision floating.    8 byte   1.7976E+308 (~15 digits)
[[_FLOAT|long double]] Long double precision float  10 byte   1.1897E+4932 (~22 digits)
[[Unicode|wchar_t]]     Wide character([[Unicode]]) 	  2 or 4   1 wide character
[[_OFFSET|PVOID]]       void pointer(void *)           ANY     Pointer or offset

* The values of the columns Size and Range depend on the system the program is compiled. The values shown above are those found on most 32-bit systems, but for other systems, the general specification is that int has the natural size suggested by the system architecture (one "word") and the four integer types char, short, int and long must each be at least as large as the numerical type preceding it, with char being always one byte in size. The same applies to the floating point types float, double and long double, where each one must provide at least as much precision as the one that preceded it.

'''                             Windows API Data Structures'''

'''Name               Description                 Bits                    QB64 Type'''
bit               8 bits in one byte            1                       [[_BIT]]
nybble            2 nybbles in one byte         4                       [[_BIT]] * 4
byte              1 byte (2 nybbles)            8                       [[_BYTE]]
Char(FunctionA)   [[ASCII]] character               8([[LEN]](buffer))          [[_BYTE]]
WORD              2 bytes                      16                       [[INTEGER]]
CharW(FunctionW)  [[Unicode]] wide character       16([[LEN]](buffer) \ 2)      [[_BYTE]] * 2
DWORD             4 bytes                      32                       [[LONG]]
QWORD             8 bytes                      64                       [[_INTEGER64]]
Ptr or LP         Short or Long Pointer name   ANY                      [[_OFFSET]]

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