Link to home
Start Free TrialLog in
Avatar of billskeen68
billskeen68

asked on

Use fopen() from c#

I have a 'c' dll that requires a FILE * fileHandle to be passed into a function. I want to use c# to do the fopen() or whatever from C#, then trough DLLIMPORT, call the 'c' function with the fileHandle created. Same applies for fclose().

Thanks,

Bill
Avatar of AlexFM
AlexFM
fopen is function from C runtime library (CRT). It is impossible to call it using PInvoke. You need to write Dll in C++ which has exported function, this function calls fopen and returns FILE*. Call this function from C# client.
Think about using managed C++, which has better interoperability features than C# and allows to call C++ functions and classes directly.
ASKER CERTIFIED SOLUTION
Avatar of AlexFM
AlexFM
Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Avatar of billskeen68
billskeen68

ASKER

The fopen()/fclose() work okay from C#, but the passinig IntPtr down doesn't work. Don't I need to create some type of structure for FILE?

Bill
Avatar of AlexFM
AlexFM
Please show your code and describe what error you have.
Avatar of appuvivan
appuvivan
iam not able to open a file using fopen in windows DDK , inspite of setting the MSVCRT=1 the sources file, do i have to set any other variable for the file operations to work?

Thank you

FILE *fp;
fp= fopen("ubl_davinci_nor.BIN", "r");
sources