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#### The HeapError variable

The heap error permits developpers to install a heap error hook which is called each time an allocation cannot be completed by the default heap manager. HeapError is a pointer that points to a function with the following prototype:

       function HeapFunc(size : longint): integer;

The size parameter indicates the size of the block which could not be allocated. Depending on the success, the error handler routine should return a value which indicates what the default heap manager should do thereafter (cf. table (8.9)).

Table 8.9: | Heap error result
Value returned | Memory manager action
0 | Generates a runtime error 203
1 | GetMem,ReallocMem and New returns nil
2 | Try allocating the memory block once again

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