Is it possible to call DLL develloped with LabView 7.0 in LabView 6.0.2 VIs?

[boucan_canot974]

Hello,

I would like to devellop DLLs in LabView 7.0 and use them in LabView 6.0.2.
Is it possible???

I tried this operation. I generated an installer (with the LabView 7.0 runtime in) and tried to load the DLL in a LabView 6.0.2 VI.
When I run the VI, LabView 6.0.2 is crashing...

Here my export function prototype:
typedef struct
{
LVBoolean status;
long code;
LStrHandle source;
} TD1;

typedef struct
{
long dimSize;
unsigned char Numeric[1];
} TD2;
typedef TD2 **TD2Hdl;

void __cdecl driver(LVBoolean *SendCommand, unsigned char DataToSend[], long LenDataToSend, char RHICommandString[], TD1 *errorInNoError, LVBoolean *GetAnswer, LStrHandle *FrameReceivedID, long *Da
taLength, TD2Hdl *DataReceived, TD1 *errorOut);

Any example ???

Thanks for your help,
Regards, Pascal.

[BJD1613]

Are you using the standard calling convention or the C calling convention in the build application menu? If you are using the C calling change it to standard. I have run into little glitches this way also. Do you have access to VB or C to try and call it that way? Maybe try that to verify if the DLL is the problem. Also make sure your vi's are exported vi's. Hope this helps.

[boucan_canot974]

Hello,
I tried the two calling conventions ... same problem.

Pascal.

[Feroz]

Hi Pascal,
I made a simple dll in LabVIEW 7 and called it from LabVIEW 6.0 and it worked fine.
I have attached the dll I built. It adds two numbers.
double Testdll(double B, double A);
Try using this and see if it works for you.
Feroz