whats new ¦  programming tips ¦  indy articles ¦  intraweb articles ¦  informations ¦  links ¦  interviews
 misc ¦  tutorials ¦  Add&Win Game

Tips (1548)

Database (90)
Files (137)
Forms (107)
Graphic (116)
IDE (21)
Indy (5)
Internet / LAN (131)
IntraWeb (0)
Math (76)
Misc (127)
Multimedia (45)
Objects/
ActiveX (51)

OpenTools API (3)
Printing (35)
Strings (83)
System (268)
VCL (243)

Top15

Tips sort by
component


Search Tip

Add new Tip

Add&Win Game

Advertising

19 Visitors Online


 
...maker the mouse wheel works correct in TDBGrid?
Autor: A D'Cruze
[ Print tip ]  

Tip Rating (15):  
     


{....}

public
  procedure 
AppMessage(var Msg: TMsg; var Handled: Boolean);
    
{....}



procedure TForm1.AppMessage(var Msg: TMsg; var Handled: Boolean);
var
  
i: SmallInt;
begin
  
{Mouse wheel behaves strangely with dgbgrids - this proc sorts this out}
  
if Msg.message = WM_MOUSEWHEEL then
  begin
    
Msg.message := WM_KEYDOWN;
    Msg.lParam := 0;
    i := HiWord(Msg.wParam);
    if i > 0 then
      
Msg.wParam := VK_UP
    else
      
Msg.wParam := VK_DOWN;

    Handled := False;
  end;
end;



  // Und im Projekt Source:
  // And in the project source:

{....}

Application.OnMessage := Form1.AppMessage;

{....}

 

Rate this tip:

poor
very good


Copyright © by SwissDelphiCenter.ch
All trademarks are the sole property of their respective owners