Creating Labview Host DLL for FPGA

[Colin hughes]

I have created a DLL for the FPGA host VI.
The host VI neads a loop to keep the FPGA running in labview but a call to the DLL function will not return while the loop is running.
If I change host VI to one shot I asume that the FPGA start and stop with each call.
I could load FPGA vi into flash set to run but I think that it will stop after first call from DLL.
Seem like a catch 22.
Thanks

[Colin hughes]

I found that I could run without the loop OK by closing the FPGA reference but not stopping the FPGA card running.

My problem now is, that the DLL does not seem to work.
I included a control updating an indicater and exported just those peramiters in the DLL but I can not get it to work with Borland C++Bulder 5.
Other DLL's that I create with Labview work OK.
Is there a broblem creating DLL's from host vi?