DllImport attribute

microsoft.public.dotnet.framework

3 Apr 2007 2:42 PM

Dmitry Dorobin

How I can write somthing like this:
[DllImport("%ProgramFiles%\\aaa.dll")]

where %ProgramFiles% - some DOS variable?

3 Apr 2007 7:06 PM

Mattias Sjögren

>How I can write somthing like this:
>[DllImport("%ProgramFiles%\\aaa.dll")]
>
>where %ProgramFiles% - some DOS variable?

You can't. What you can do instead is is to just use
[DllImport("aaa.dll")], and then explicitly load the DLL with
LoadLibrary before using it.

Mattias

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Mattias Sjögren [C# MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
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4 Apr 2007 1:52 PM

Dmitry Dorobin

>
> >How I can write somthing like this:
> >[DllImport("%ProgramFiles%\\aaa.dll")]
> >
> >where %ProgramFiles% - some DOS variable?
>
> You can't. What you can do instead is is to just use
> [DllImport("aaa.dll")], and then explicitly load the DLL with
> LoadLibrary before using it.

Oh! Sorry for stupid question... Can you show me how I can do this?
Something like this doesn't work correct...

[DllImport("kernel32.dll")]
static extern IntPtr LoadLibrary(string lpFileName);

[DllImport("aaa.dll")]
static extern void bbb();

void main()
{
IntPtr lib = LoadLibrary("C:\\Program Files\\...Some path...\\aaa.dll");
bbb();
}