Setting a private variable in a dll (noobie)

[Aristotelis E. Charalampakis]

Hi everyone, this is a newbie question...

I have a dll written in c++. This dll is called from a executable written
in VB 6.0

I want to use a variable (say a float) within multiple functions in the dll.
I also want to retrieve, set or change the value of this variable within the
dll at any time using functions such as, say, SetVariable1 or GetVariable1
from my exe program.

Can I do this? ( I use stdcall and all the names of the external functions
are in a .def file)

Tia,

Aristotelis

 

[lallous]

"Aristotelis E. Charalampakis"

Hi everyone, this is a newbie question...

I have a dll written in c++. This dll is called from a executable written
in VB 6.0

I want to use a variable (say a float) within multiple functions in the dll.
I also want to retrieve, set or change the value of this variable within the
dll at any time using functions such as, say, SetVariable1 or GetVariable1
from my exe program.

Can I do this? ( I use stdcall and all the names of the external functions
are in a .def file)

Tia,

Aristotelis

Hello,

You can have a global float variable in your DLL, and export set/get methods
so that they are called from your VB application...

float g_val1;

// exported function
void SetValue1(float f)
{
g_val = f;
}

void GetValue1(float &f)
{
f = g_val1;
}

However if you have further questions regarding DLL issues or other non
strictly C++ issue, ask in microsoft.public.vc.language