Solved

ClipBoard & Stream

Posted on 1998-10-22
3
246 Views
Last Modified: 2010-04-06
I try to use this:
  Buffer:=GetAsHandle(cf_privatefirst);
  BufferPtr:=GlobalLock(Buffer);
  Stream.Write(BufferPtr^,SizeOf(PSM));
In the case that stream contains only one PSM it works. If the Stream contains more PSM i don't know how can I get the count parameter of write! Of course I know how often I wrote but using the clipboard I can not use it!
0
Comment
Question by:Saxon
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 12

Accepted Solution

by:
rwilson032697 earned 50 total points
ID: 1344078
You can do this in two ways:

1. Determine how big the global block is (using GlobalSize(Buffer)) and determining how many PSM's fit into it

2. When you write that data into the clipboard, first write out the number of PSMs to follow, followed by the PSMs. When you read it in first read the number followed by that many PSMs.

Cheers,

Raymond.
0
 

Author Comment

by:Saxon
ID: 1344079
In principle it works. Thx! But why I get a bigger (4672 instead of 4668) size value. The win api help tells me, that the size may be larger. If the additional bytes added at the end it shouldn't be a problem. But can I be sure for that?
0
 
LVL 12

Expert Comment

by:rwilson032697
ID: 1344080
Global blocks (using GlobalAlloc at least) are guaranteed to be aligned on an 8 bytes boundary. The API proabaly just adds the slack to the allocated area to make it easier to track it. I think you are safe assuming that the extra is always at the end.

Cheers,

Raymond
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering 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

Title # Comments Views Activity
Dev Express grid collapse 2 47
How to renew a Delphi rad-studio licence? 5 77
Delphi inherited method 6 79
Not able to call Delphi XE10 dll function from Delphi 6.0 4 48
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…
Introduction Raise your hands if you were as upset with FireMonkey as I was when I discovered that there was no TListview.  I use TListView in almost all of my applications I've written, and I was not going to compromise by resorting to TStringGrid…
Attackers love to prey on accounts that have privileges. Reducing privileged accounts and protecting privileged accounts therefore is paramount. Users, groups, and service accounts need to be protected to help protect the entire Active Directory …

749 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