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

Tips (1541)

Database (90)
Files (137)
Forms (107)
Graphic (114)
IDE (21)
Indy (5)
Internet / LAN (130)
IntraWeb (0)
Math (76)
Misc (126)
Multimedia (45)
Objects/
ActiveX (51)

OpenTools API (3)
Printing (35)
Strings (83)
System (266)
VCL (242)

Top15

Tips sort by
component


Search Tip

Add new Tip

Add&Win Game

Advertising

19 Visitors Online


 
...obtain the text of a specified window's title bar?
Autor: Thomas Stutz
[ Print tip ]  

Tip Rating (2):  
     


// This example will show you a faster method how you can obtain
// the text of the specified window's title bar under Windows NT/2000 systems.
// (c)1999 Ashot Oganesyan K, SmartLine, Inc
// mailto:ashot@aha.ru, http://www.protect-me.com, http://www.codepile.com

// The function copies the text of the specified window's title bar
// (if it has one) into a buffer. The InternalGetWindowText function is
// much faster than the documented GetWindowText because it uses INT 2E interrupt

// NT-Specific!
// Here is the prototype for InternalGetWindowText:

(*
  InternalGetWindowText(
  hWnd: HWND;  {a handle to a window or control with text}
  lpString: PChar;  {a pointer to a buffer to receive the string (UNICODE!!!)}
  nMaxCount: Integer  {the maximum number of characters to copy}
  ): Integer;  {returns the length of the copied string}
*)


function NT_InternalGetWindowText(Wnd: HWND): string;
type
  
TInternalGetWindowText = function(Wnd: HWND; lpString: PWideChar;
    nMaxCount: Integer): Integer; 
  stdcall;
var
  
hUserDll: THandle;
  InternalGetWindowText: TInternalGetWindowText;
  lpString: array[0..MAX_PATH] of WideChar; //Buffer for window caption
  
oemStr: PChar;
begin
  
Result   := '';
  hUserDll := GetModuleHandle('user32.dll');
  if (hUserDll > 0) then
  begin 
@InternalGetWindowText := GetProcAddress(hUserDll, 'InternalGetWindowText');
    if Assigned(InternalGetWindowText) then
    begin
      
InternalGetWindowText(Wnd, lpString, SizeOf(lpString));
      Result := string(lpString);
    end;
  end;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  
ShowMessage(NT_InternalGetWindowText(Form1.Handle));
end;

 

Rate this tip:

poor
very good


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