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Hi,
P/Invoke is the way to access existing native functions, in this case they reside in system files gdi32.dll and user32.dll; the "extern" keyword tells the C# compiler only a prototype is provided, the implementation is to be found in those DLL files.
What seems to be missing in the article is the fact that your code should start with a statement
using System.Runtime.InteropServices; for the compiler to understand what DllImport means.
Luc Pattyn
Have a look at my entry for the lean-and-mean competition; please provide comments, feedback, discussion, and don’t forget to vote for it! Thank you.
Local announcement (Antwerp region): Lange Wapper? Neen!
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Thankyou. You are right. That was a missing piece for me.
Now that you have told me about the PInvoke, I looked that up on the MSDN web site and they have a tutorial there which I will study.
a couple of questions that I have right now is:
do I copy the dll's from my system directory to my project to use them?
Is this the best way to install a type font programatically?
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See here[^] for some good information on the AddFontResource function, and PInvoke in general.
HighCloud wrote: do I copy the dll's from my system directory to my project to use them?
No, the runtime system knows where to find them.
HighCloud wrote: Is this the best way to install a type font programatically?
I'm not sure of the answer to this one, but there are some useful articles on Fonts here on CP.
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Thanks again.
I believe that for now I have enough information to compile and experiment with this material.
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Hi,
could you provide the P/Invoke link? I am in the middle of writing an article on the subject, and eager to get more material.
FYI: you don't have to install a font to use it in your own app, there is a PrivateFontCollection class that could help you out. (I haven't used it myself though).
Luc Pattyn
Have a look at my entry for the lean-and-mean competition; please provide comments, feedback, discussion, and don’t forget to vote for it! Thank you.
Local announcement (Antwerp region): Lange Wapper? Neen!
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See my previous answer; it's PInvoke.net. Surprised that you didn't know about this, I felt sure you would have written some of it. 
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Sorry, I misunderstood. I have known and like pinvoke.net for years (even when it has some errors); I am looking more for tutorial material though.
Luc Pattyn
Have a look at my entry for the lean-and-mean competition; please provide comments, feedback, discussion, and don’t forget to vote for it! Thank you.
Local announcement (Antwerp region): Lange Wapper? Neen!
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I must admit to being somewhat surprised that you did not know about it. Unfortunately it's my only source, although some of the entries do contain some quite useful sample code.
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As I said before, I have been using www.pinvoke.net for many years. It offers reasonable reference material, somewhat incomplete and sometimes plain wrong.
I would like to see better P/Invoke tutorial stuff e.g. explaining all the Marshaling alternatives, and that is why I am writing my own article right now.
Luc Pattyn
Have a look at my entry for the lean-and-mean competition; please provide comments, feedback, discussion, and don’t forget to vote for it! Thank you.
Local announcement (Antwerp region): Lange Wapper? Neen!
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Luc Pattyn wrote: and that is why I am writing my own article right now.
Excellent news; I'm looking for a decent tutorial 
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Would you be interested in proofreading and providing feedback?
I plan a two-part article, of which the first part is almost ready (except for the download).
It contains general principles and many simple examples (C# so far, will be adding VB.NET), but skips everything about structs.
BTW: not sure I will publish it on CP as the house style doesn't really fit; I'll have to take that up with Chris in a couple of weeks.
Luc Pattyn
Have a look at my entry for the lean-and-mean competition; please provide comments, feedback, discussion, and don’t forget to vote for it! Thank you.
Local announcement (Antwerp region): Lange Wapper? Neen!
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Luc Pattyn wrote: Would you be interested in proofreading and providing feedback?
I'd be happy to help in any way I can, although I have to warn you I'm neither a brilliant programmer nor an accomplished technical writer.
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AddFontResource is not on PInvoke.net (yet)
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harold aptroot wrote: AddFontResource is not on PInvoke.net (yet)
Shazzam![^]
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Wut?
I did a search for it 4 hours ago, no results..
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harold aptroot wrote: I did a search for it 4 hours ago, no results..
Come on Harold, this isn't like you, get a grip! What's this[^]?
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I don't know man
It certainly looks like the right page?
How did you find it?
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harold aptroot wrote: How did you find it?
www.pinvoke.net then use the left hand selector to find gdi32. Click the plus sign and it opens up, and you can see the individual entries.
I already new www.pinvoke.net to start with, so I did not Google it; maybe it's not well indexed.
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Hm.. I tried to use that search bar of pinvoke itself (left top)
Apparently it doesn't work so well..
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harold aptroot wrote: Hm.. I tried to use that search bar of pinvoke itself (left top)
Apparently it doesn't work so well..
This is weird, I just tried it and it worked fine. It found AddFontResource, AddFontResourceEx and RemoveFontResource! Even just using "fontresource" as a search key finds them all.
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Hm.. that's not good, that means I'm becoming like CG, everything malfunctioning around me 
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harold aptroot wrote: Hm.. that's not good, that means I'm becoming like CG, everything malfunctioning around me
do
{
I have days like this when I spend hours tweaking code, testing, asserting, throwing etc. And then, after what seems a lifetime, I spot the misplaced comma, the transposed operand, or whatever, and suddenly it all starts to work correctly. But I never tell anyone else about the stupid mistake I made, that the rawest rookie could spot from twenty-five paces. I just mutter into my coffee and promise not to be so careless in future.
} while (true);
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Don't tell CG. He would have to close down his blog[^].
Luc Pattyn
Have a look at my entry for the lean-and-mean competition; please provide comments, feedback, discussion, and don’t forget to vote for it! Thank you.
Local announcement (Antwerp region): Lange Wapper? Neen!
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I want to retrieve the data from Excel Sheet row and column wise and then I want to manipulate the data and then I want to store it in data base. using VS 2008 C#
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