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How to add DblClick event?

 

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If it has TControl as an ancestor then put:

published property OnDblClick;

into your class declaration.

Otherwise use the following code to capture the message:

type
  TYourClass=class(WhatEverclass you want)
  private
    FOnDblClick : TNotifyEvent;
  procedure WMDblClick(var :TWMLButtonDBLCLK);
    message WM_LBUTTONDBLCLK;
  // ..
  public
    OnDblClick : TNotifyEvent read FOnDblClick write FOnDblClick;
  end;

// if you don't want a property OnDblClick
procedure TYourClass.WMDblClick(var :TWMLButtonDBLCLK);
begin
  inherited;
  // do your stuff here
end;

// or: if you do want a property OnDblClick
procedure TYourClass.WMDblClick(var :TWMLButtonDBLCLK);
begin
  inherited;
  if Assigned (FOnDblClick)
    FOnDblClick(Self);
end;

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