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...change the value of Constants?
Autor: Thomas Weidenmueller
Homepage: http://www.w3seek.de
[ Print tip ]  

Tip Rating (2):  
     


procedure ChangeConst(const Constant; var Value; Size: Integer);
begin
  
Move((@Value)^, (@Constant)^, Size);
end;

// How to use ChangeConst: (Sample)

const
  
TestStrConst: string = 'This is a text sample';
  TestInteger: Integer = 4367;
var
  
NewString: string;
  NewInteger: Integer;
begin
  
// String Demo:
  
ShowMessage('Before ChangeStringConst (TestStrConst): ' + TestStrConst);
  NewString := 'New Value';
  ChangeConst(TestStrConst, NewString, SizeOf(string));
  ShowMessage('After ChangeStringConst (TestStrConst): ' + TestStrConst);
  // Integer Demo:
  
ShowMessage('Before ChangeStringConst (TestInteger): ' + IntToStr(TestInteger));
  NewInteger := 93534;
  ChangeConst(TestInteger, NewInteger, SizeOf(Integer));
  ShowMessage('After ChangeStringConst (TestInteger): ' + IntToStr(TestInteger));
end;

 

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