Calling Createparams from an inherited component

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I have a component inherited from a Tedit. I already have an override of the CreateParams and by default it has the following parameters: 

Params.Style := Params.Style or WS_CLIPCHILDREN or ES_MULTILINE or ES_AUTOHSCROLL;

But sometimes, I would like to change these parameters by removing the ES_MULTILINE.

Specifically, in the Enter of the component, I would like to add the ES_MULTILINE, and at Exit I’d like to remove it.

Is it possible? If yes, how to do?

delphi

  • You cannot use the Focused or Mouseinclient control property to do an if there?

  • But how to set these parameters? This is my question. It has how to do some command like SetParams??? Or how to call the CreateParams??? I know it’s possible to call CreateParams by command RecreateWnd, but in doing so Enter control, focus is not the same. - @Tiagorodrigues

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I think this is your problem https://stackoverflow.com/questions/14734419/changing-createparams-dynamically

I will not put the code that is already there in the link but basically is to use Recreatewnd but with a Boolean flag to control the number of times it is called.

  • Create a flag in your class
  • In the ENTER event, do Recreatewnd if the flag is false
  • In the ENTER event, set the flag to true
  • In the EXIT event put the flag back to false

  • I solved my original problem without touching the Createparams, but your solution may be valid for someone else with the same problem. Thank you.

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