Open BTRieve in code with Owner

[Shaga]

I need to open a BTRieve file which has the OWNER set in C#. I know what the owner is I would like to know what to pass through in the 3rd param for the Open (0) operation. At present I pass through an IntPtr.Zero.

 

[Shaga]

For the record I have solved it thus:

Create a structure in which to store the Owner Name:

[StructLayout(LayoutKind.Sequential, Pack=1, CharSet=CharSet.Ansi, Size=8)]
public struct BTR_OWNER_NAME
{
public string OwenerName;
}

//Declare a struct var:

BTR_OWNER_NAME ownerBuf;

//Assign the constant in which the Owner Name is held (this contains 6 chars):

ownerBuf.OwenerName = OWNER_NAME;

//Pass the length of the Owner Name +1 for the trailing Binary 0 into var:

dataLen = 7;

// move our owner structure into unmanaged memory block
dataBuffer = Marshal.StringToHGlobalAnsi(ownerBuf.OwenerName);

// and finally issue OPEN (0) operation to Btrieve with the dataBuffer containg the Owner Name:

try
{
bStat = BtrCall.BTRCALL( (ushort)BTROPS.B_OPEN, posBlock, dataBuffer, ref dataLen, keyBuffer, keyLen, keyNum );
}
catch( Exception e )

bStat has been assigned 0, so all is fine and the Btrieve file which has an Owner Name set with access level 0 is now open.

 

[TomKane]

Fair play to you