Solved

Retrieving free GDI-Ressources in Win98 and still executable under Win2000/XP

Posted on 2003-10-31
5
344 Views
Last Modified: 2010-05-18
Hi !

I have a Program that uses a lot of GDI-Ressources for every open Dialog. Under Win98 this is a Problem because there are only limited GDI-Ressources. So before opening a new Dialog I want to test the remaining free GDI-Ressources. There is a possibility with a Windows-98 API Function QT_Thunk. I include it in my Program with this line:  

procedure QT_Thunk; cdecl; external kernel32 name 'QT_Thunk';

So this works fine under Win98, but when I start the program und Win2000 there is an error Message, that this API-Function is not available. I don't want to call the function under Win2000 because I have no GDI-Problem under Win2000.
My Question is, is there a way to have one program that works under Win98 and Win2000 and still retrieves under Win98 the remaining GDI-Ressources?
Or is the only solution to provide different programs for the Platforms Win98 and Win2000/XP

Thanks Mischa
0
Comment
Question by:Mischa_Kuchinke
  • 2
  • 2
5 Comments
 
LVL 17

Assisted Solution

by:Wim ten Brink
Wim ten Brink earned 125 total points
ID: 9658638
Just ask which version of Windows is currently running... If you use Delphi 7 then use Win32MajorVersion, Win32MinorVersion and Win32BuildNumber from the SysUtils unit, otherwise use the GetVersionEx API to retrieve the Windows version. Delphi 7 also has a function called CheckWin32Version to check the version number.
0
 
LVL 17

Expert Comment

by:Wim ten Brink
ID: 9658639
Just ask which version of Windows is currently running... If you use Delphi 7 then use Win32MajorVersion, Win32MinorVersion and Win32BuildNumber from the SysUtils unit, otherwise use the GetVersionEx API to retrieve the Windows version. Delphi 7 also has a function called CheckWin32Version to check the version number.
0
 

Author Comment

by:Mischa_Kuchinke
ID: 9658742
Okay that was one part of my problem. The other is, that with the line

procedure QT_Thunk; cdecl; external kernel32 name 'QT_Thunk';

i am always trying to load the function QT_Thunk which raises an error when I am starting the Program in Win2000. But I found something in the Delphi Help Files "Dynamic Loading". So I try perhaps with Dynamic Loading and your Version checking I get what I want.

Lets Try.
0
 
LVL 6

Accepted Solution

by:
GloomyFriar earned 125 total points
ID: 9660127
_imp_QT_Thunk: procedure; cdecl;
hLib: THandle;


hLib := LoadLibrary ( 'kernel32.dll' );
if hLib <> 0 then begin
  @_imp_QT_Thunk  := GetProcAddress ( hLib, 'QT_Thunk');
end else begin
  //Error loading dll
end;
0
 

Author Comment

by:Mischa_Kuchinke
ID: 9662659
Thanks to anyone. Yes Dynamic Loading was the solution and it worked. Together I could check the operation System and then load the Procedure dynamic.
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
How to fill array with TArray.Create? 14 96
delphi exception 7 68
Delphi: how to implement a User Shortcut mapper? 1 120
How to load 2 images in same column in Delphi 2 57
This article explains how to create forms/units independent of other forms/units object names in a delphi project. Have you ever created a form for user input in a Delphi project and then had the need to have that same form in a other Delphi proj…
Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
Microsoft Active Directory, the widely used IT infrastructure, is known for its high risk of credential theft. The best way to test your Active Directory’s vulnerabilities to pass-the-ticket, pass-the-hash, privilege escalation, and malware attacks …
This video shows how to use Hyena, from SystemTools Software, to bulk import 100 user accounts from an external text file. View in 1080p for best video quality.

830 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question