System

In Delphi, ErrorProc is a procedure variable pointing to the runtime error handler. The standard ErrorProc procedure reports the runtime error and terminates the program. 

The ErrorProc variable is retained primarily for compatibility with older code. Newer applications should not specify an alternate runtime error procedure using ErrorProc as SysUtils uses this variable to convert runtime errors into exceptions. 

If you use SysUtils in your program, it will force ErrorProc to its own routine and convert the runtime error into an exception. When a runtime library error occurs, the ErrorProc is called. The ErrorCode parameter contains the runtime error number and the ErrorAddr parameter contains the machine code address that caused the runtime error. 

ErrorAddr 

ExceptAddr 

ExceptionErrorMessage 

ExceptObject 

GetLastError 

ExceptProc 

GetLastError 

AcquireExceptionObject