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ClipBoard & Stream

Posted on 1998-10-22
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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!
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Question by:Saxon
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rwilson032697 earned 200 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.
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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?
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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
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