Solved

Colour change

Posted on 1998-01-18
1
783 Views
Last Modified: 2010-04-16
how do i change the text and background colour using Borland turbo pascal for windows.
Cheers
Scarhand
0
Comment
Question by:Scarhand
1 Comment
 
LVL 5

Accepted Solution

by:
inter earned 50 total points
ID: 1217167
In windows, when you want to draw any thing on windows. You should do it by calling windows internal functions called GDI (graphic driver interface) API(application programmers interface). To draw, you must first obtain a handle (an integer value like pointer that points to that memory object). Once you obtain the handle, you can modify its properties, and paint on it. The following example writes a Blue text on your window in Borland Pascal.

var
  ThePen, OldPeb : HPen; {these are defined by wintypes unit}
  TheDC  : HDC;
const
  Ts : PChar = 'This is test'#0;
begin
  TheDC := GetDC(hWnd);  {obtain device context handle for hWnd}
                         {Hwnd is a handle to out window ssigned}
                         {by Windows}
  ThePen := CreatePen(psSolid, 1, BLUE);
  OldPen := SelectObject(TheDC, ThePen);
  {Begining of any drawing}
  TextOut(TheDC, 10,10, Ts, Length(Ts)); {now draw text at 10,10}
                                         {Since the PEN is BLUE}
                               {The text will be blue}
  {End of any drawing}
  SelectObject(TheDC, OldPen); {Replace old pen}
  DeleteObject(ThePen);   {Free up pen}
  ReleaseDC(hWnd, TheDC); {Free up the DC}
end;

As you see the operation is a bit complex. This is due to the fact that windows drawing system should maintain all the applications drawings and prevent them from destroying other windows appereance.
To my personal oppinion if you want to program on windows you'd better program in Borland Delphi since you know pascal. If this not satisfy you I may give more info...
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Suggested Solutions

If you are looking at this article, you have most likely been hit by some version of ransomware and are trying to find out if there is anything you can do, or what way you should react - READ ON!
ConnectWise and their customers need to ensure critical alerts automatically reach the right person at the right time. MSP superheros efficiently respond to these alerts key is providing automatic, intelligent alerting that generates a complete audi…
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…
In a recent question (https://www.experts-exchange.com/questions/29004105/Run-AutoHotkey-script-directly-from-Notepad.html) here at Experts Exchange, a member asked how to run an AutoHotkey script (.AHK) directly from Notepad++ (aka NPP). This video…

860 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