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System Unit Variables and Typed Constants
Variables (uninitialized)
Variable │ Type │ Description
═══════════╪══════════════════╪════════════════════════════════════
Input │ Text │ Input standard file
Output │ Text │ Output standard file
Constants (initialized variables)
│Initial │
Variable │ Type │ Value │ Description
═══════════╪═════════╪════════╪════════════════════════════════════
CmdLine │ PChar │ nil │ Command line pointer
CmdShow │ Integer │ 0 │ CmdShow parameter for CreateWindow
ErrorAddr │ Pointer │ nil │ Run-time error address
ExitCode │ Integer │ 0 │ Exit code
ExitProc │ Pointer │ nil │ Exit procedure
FileMode │ Byte │ 2 │ File open mode
HeapBlock │ Word │ 8192 │ Heap block size
HeapError │ Word │ nil │ Heap error function
HeapLimit │ Word │ 1024 │ Heap small block limit
HeapList │ Word │ 0 │ Heap segment list
HInstance │ Word │ 0 │ Handle of this instance
HPrevInst │ Word │ 0 │ Handle of previous instance
InOutRes │ Integer │ 0 │ I/O result buffer
PrefixSeg │ Word │ 0 │ Program segment prefix (PSP)
RandSeed │ LongInt │ 0 │ Random seed