[Lazarus] Forms.pp function error?

[AlexeyT]

On 16.10.2018 09:56, Michael Van Canneyt via Lazarus wrote:
> There does not need to be if there is no corresponding MK_nnn value ?
> What would be the MK_nnn value for ssAlt ? 

We can  add in, LCLType.pp:

const
   // Mouse message key states
   MK_LBUTTON  = 1;
   MK_RBUTTON = 2;
   MK_SHIFT = 4;
   MK_CONTROL = 8;
   MK_MBUTTON = $10;
   MK_XBUTTON1 = $20;
   MK_XBUTTON2 = $40;
   // following are "virtual" key states
   MK_DOUBLECLICK = $80;
   MK_TRIPLECLICK = $100;
   MK_QUADCLICK = $200;

-- 

Regards,
Alexey