Ultimate Pack  hot! Image Editor  new! Runtime Fusion Form Designer Object Inspector Print Suite Pro Commented Image Delphi Toys WinDowse Delphi Bonus TMS Scripter Studio Form Designer VB Form Designer .NET ...get more... for Delphi.NET, C#, VB.NET for Delphi VCL, BCB 3-6

	WinAPI Online Unix Manual Pages MegaDetailed.NET in3steps.com cdtrrracks.com new!   greatis.blogspot.com

Use GetSystemMetrics function with SM_MOUSEWHEELPRESENT parameter.
Note: for Windows NT only.

procedure TForm1.Button1Click(Sender: TObject);
begin
  if GetSystemMetrics(SM_MOUSEWHEELPRESENT)<>0 then
    Label1.Caption:='You have a wheel'
  else
    Label1.Caption:='You have not a wheel';
end;

Related topics

Detect a mouse in the system

For more

Win32 prorammer's referenfe

Download source