Register

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The modifier register:

• belongs to the calling conventions of internal and external subroutines;
• is for compatibility with Delphi;
• has been supported since FPC 1.9.x;
• is used to call the first three parameters in the register.

Example:

function subTest: string; [register];
begin
   subTest: = 'abc';
end;

Example 2:

function funcTest (strTestdaten: Pchar): LongWord; register; external 'Test.dll';