Calling DLL export function(unmana ged visual c++ code) from managed code(Visual c#,.net)

[seash]

class xyz{

public void somefunction{

if(this.folderB rowserDialog1.S howDialog() == DialogResult.OK )
{
m_varFolderPath = this.folderBrow serDialog1.Sele ctedPath;
m_varFolderPath += "\\Iamlucky.txt ";


System.String a =(String)strVar iable1;
System.String b =(String)strVar iable2;
System.String c =(String)m_varF olderPath;

try
{

/* DidData is the dll export method created in class clsCallDllBacku p*/
if(clsCallDllBa ckup.DigData(a, b,c))
MessageBox.Show ("yyyyyyyyyyyyy ");
else
MessageBox.Show ("00000000") ;
}
catch
{
MessageBox.Show ("xxxxxxxxxx ");
}

}

}//end of function

}//end of class


public class clsCallDllBacku p
{
public clsCallDllBacku p()
{

}

[DllImport("DigI nfo.dll", EntryPoint="Ext ractJobDigData" )]
public static extern bool DigData(String strProjectName, String strJobName,Stri ng strFilepathname );
}

problem: the intended exported dll function 'DigDat'(unmana ged code) is not creating a binary text file on a
choosen folder, Iam calling the DLL exported function from managed code.

description:

I created a class for the dll as class clsCallDllBacku p which is having the prototype
for exported fuction ExtractJobDigDa ta.

Diginfo.dll will creat a txt file with binary information in selected folder, but in c# the
selected path will be as @"D:\\somefolde r\\mylucky.txt" ,

but the input folderpath for the dll function will be as "D:\\somefolder \\mylucky.txt" without
the symbol "@", is it any problem for the dll function in creating the text file on my choosen folder

how to give the input to dll exported function without "@" ie, as "D:\\somefolder \\mylucky.txt"

the signature of dll export function is ExtractJobDigDa ta(LPSTR strVariable1,LP STR strVariable2,LP STR m_varFolderPath )

when i run the program iam getting the true statement MessageBox.Show ("yyyyyyyyyyyyy "); but the required out put of the
dll ie, a text file is not getting created on the choosen folder

[seash]

----- seash wrote: ----

class xyz

public void somefunction

if(this.folderB rowserDialog1.S howDialog() == DialogResult.OK

m_varFolderPath = this.folderBrow serDialog1.Sele ctedPath
m_varFolderPath += "\\Iamlucky.txt ";


System.String a =(String)strVar iable1
System.String b =(String)strVar iable2
System.String c =(String)m_varF olderPath

try
/* DidData is the dll export method created in class clsCallDllBacku p*
if(clsCallDllBa ckup.DigData(a, b,c)
MessageBox.Show ("yyyyyyyyyyyyy ")
els
MessageBox.Show ("00000000")

catc

MessageBox.Show ("xxxxxxxxxx ")


}//end of functio

}//end of clas


public class clsCallDllBacku

public clsCallDllBacku p(


[DllImport("DigI nfo.dll", EntryPoint="Ext ractJobDigData" )
public static extern bool DigData(String strProjectName, String strJobName,Stri ng strFilepathname )


problem: the intended exported dll function 'DigDat'(unmana ged code) is not creating a binary text file on a
choosen folder, Iam calling the DLL exported function from managed code

description

I created a class for the dll as class clsCallDllBacku p which is having the prototyp
for exported fuction ExtractJobDigDa ta

Diginfo.dll will creat a txt file with binary information in selected folder, but in c# the
selected path will be as @"D:\\somefolde r\\mylucky.txt"

but the input folderpath for the dll function will be as "D:\\somefolder \\mylucky.txt" withou
the symbol "@", is it any problem for the dll function in creating the text file on my choosen folde

how to give the input to dll exported function without "@" ie, as "D:\\somefolder \\mylucky.txt

the signature of dll export function is ExtractJobDigDa ta(LPSTR& strVariable1,LP STR& strVariable2,LP STR& m_varFolderPath
when i run the program iam getting the true statement MessageBox.Show ("yyyyyyyyyyyyy "); but the required out put of th
dll ie, a text file is not getting created on the choosen folde