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5719 :: Can't understand the compiler error message

• kcvinu (orginal) [2019-12-20T11:34:53+01:00] view original

  Hi all, I have this code in module A

  # Module A
  let wmu_DrawControl*  : UINT = WM_USER + 6
  Run

  And i have this code in Module B

  # Module B
  # this is WndProc of parent Gui
  case message
          of WM_DRAWITEM :
                  # sending child a message
                  sendMsg(ctlHwnd, wmu_DrawControl, 0, 0)
                  return true
  Run

  Now, this is the code in Module C. And here is the problem

  # Module C
  # Inside a subclassed WndProc
  case message
          of wmu_DrawControl :  # This line is causing the error !
          echo "Prepare for drawing the button."
  Run

  And the compiler says that Error: cannot evaluate at compile time: wmu_DrawControl in Module c. I don't know why. Please help. I've tried with straight declaration like "let wmu_DrawControl = 1030" but not worked.

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• Stefan_Salewski (orginal) [2019-12-20T11:57:18+01:00] view original

  
  of wmu_DrawControl :  # This line is causing the error !
  Run

  The value after of keyword in case statement have to be a constant, but you define it in module a with let, which is not a const def.

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• kcvinu (orginal) [2019-12-20T12:07:17+01:00] view original

  Thanks for the quick reply. Let me try

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• kcvinu (orginal) [2019-12-20T12:11:26+01:00] view original

  Thanks. It worked.

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