using win32 dll in c# ?

[chandu]

hello,

i want to use win32 dll in my c# application.i copied that dll in my
bin/debug folder and then i used one of its function like this......
[DllImport("XCENLogInterface.dll")]

public static extern void SetPatientLogFileName(string pPatientLogFileName);

if i call this method it is giving exception

"Entry point not found Exception".

Then i used like this:

[DllImport("XCENLogInterface.dll", EntryPoint = "SetPatientLogFileName",
CharSet = CharSet.Auto)]

public static extern void SetPatientLogFileName(string pPatientLogFileName);

even also i am getting problem.

can any one send inforamation regarding using an existing win32 dll in my c#
applicatin?

thanks

 

[Ignacio Machin \( .NET/ C# MVP \)]

Hi

What problems are u getting after especify the entry point?

 

[chandu]

i am getting same problem
"Entry Point NotFound Exception.

Hi

What problems are u getting after especify the entry point?

hello,

i want to use win32 dll in my c# application.i copied that dll in my
bin/debug folder and then i used one of its function like this......
[DllImport("XCENLogInterface.dll")]

public static extern void SetPatientLogFileName(string
pPatientLogFileName);

if i call this method it is giving exception

"Entry point not found Exception".

Then i used like this:

[DllImport("XCENLogInterface.dll", EntryPoint = "SetPatientLogFileName",
CharSet = CharSet.Auto)]

public static extern void SetPatientLogFileName(string
pPatientLogFileName);

even also i am getting problem.

can any one send inforamation regarding using an existing win32 dll in my
c# applicatin?

thanks

 

[MrAsm]

i want to use win32 dll in my c# application.i copied that dll in my
bin/debug folder and then i used one of its function like this......
[DllImport("XCENLogInterface.dll")]

public static extern void SetPatientLogFileName(string pPatientLogFileName);

if i call this method it is giving exception

"Entry point not found Exception".

In what language was the DDL built?
Was the DLL built using Visual C++? And what calling convention was
used?

This is because Visual C++ decorates DLL function identifiers.
If you use __cdecl calling convention, a leading underscore is
introduced.
If you use __stdcall, the decoration is as follow: leading underscore
(_) and a trailing at sign (@) followed by a number representing the
number of bytes in the parameter list.
So, "int func( int a, double b )" is decorated as follows: "_func@12".

You might want to see:

<http://msdn2.microsoft.com/en-us/library/x7kb4e2f(VS.71).aspx>

So, I suspect that the actual entry point of your DLL function is not
"SetPatientLogFileName", but something different, like
"_SetPatientLogFileName" (with a leading underscore), or something
with the @ sign...

I would use DUMPBIN /EXPORTS <your dll> to see the actual exported
identifiers.

Mr.Asm

 

[Otis Mukinfus]

i want to use win32 dll in my c# application.i copied that dll in my
bin/debug folder and then i used one of its function like this......
[DllImport("XCENLogInterface.dll")]

public static extern void SetPatientLogFileName(string pPatientLogFileName);

if i call this method it is giving exception

"Entry point not found Exception".

In what language was the DDL built?
Was the DLL built using Visual C++? And what calling convention was
used?

This is because Visual C++ decorates DLL function identifiers.
If you use __cdecl calling convention, a leading underscore is
introduced.
If you use __stdcall, the decoration is as follow: leading underscore
(_) and a trailing at sign (@) followed by a number representing the
number of bytes in the parameter list.
So, "int func( int a, double b )" is decorated as follows: "_func@12".

You might want to see:

<http://msdn2.microsoft.com/en-us/library/x7kb4e2f(VS.71).aspx>

So, I suspect that the actual entry point of your DLL function is not
"SetPatientLogFileName", but something different, like
"_SetPatientLogFileName" (with a leading underscore), or something
with the @ sign...

I would use DUMPBIN /EXPORTS <your dll> to see the actual exported
identifiers.

Mr.Asm

Thank you!

Good luck with your project,

Otis Mukinfus
http://www.arltex.com
http://www.tomchilders.com