global variable in DLL (UserFuncs.h)

Hello,

I would like to use a global (Flexsim) variable in my dll code, but I cannot get it to work. What I did:
I added the UserFuncs.h file from the dll maker to my header files.
I declared a global variable as:
DECLARE_FLEXSIM_GLOBAL_VARIABLE( WM_Control, treenode )
#define WM_Control (*_WM_Control_pointer)

when I try to compile (debug or release mode) I get the following error msg:
>c:\flexsim\flexsim5\libraries\dll maker\userfuncs.h(16) : error C2065: 'intWM_Control_globalvariableindex' : undeclared identifier
1>c:\flexsim\flexsim5\libraries\dll maker\userfuncs.h(16) : error C2065: 'WM_Control_globalvariableindex' : undeclared identifier
1>c:\flexsim\flexsim5\libraries\dll maker\userfuncs.h(16) : error C2065: 'successful' : undeclared identifier
1>c:\flexsim\flexsim5\libraries\dll maker\userfuncs.h(16) : error C2065: 'WM_Control_globalvariableindex' : undeclared identifier

can anyone explain how to use the global variables in dll code? Thanks.!

Esther

If you have a global variable that you only want to use within your dll, just add it like a usual global variable in C++ by defining it outside the scope of any function or class.

Hi,

If it is a global variable in a Flexsim model, try to add this line of code to UserFuc.h.

#define DECLARE_FLEXSIM_GLOBAL_VARIABLE(name, type) type * _##name##_pointer;

It should be above your declaration.

When tested in VS C++ 2005 there are no error in compiling but I have not tested to use it in a DLL.

Lars-Olof

Hello Lars-Olof and Phil,

Thanks for your replies. The object I want to refer to is indeed a Flexsim Global Variable and Lars_Olofs tip helped me in a way, but all my references in the cpp files give error msgs when building the solution. I get an error "C2440: 'initializing' : cannot convert from 'linkedlist *' to 'treenode *'
1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast".
I had already tried the tip Phil gave me in an earlier stage, but did not succeed, I will try this again though and try to get it to work.

Esther

Esther,
I've made and committed some changes to the dll repository. It turns out it was an issue with binding.h. I changed the definition of DECLARE_FLEXSIM_GLOBAL_VARIABLE to:

#define DECLARE_FLEXSIM_GLOBAL_VARIABLE(name, type)\
	int _##name##_globalvariableindex = getglobalvariableindex(#name);\
	if(_##name##_globalvariableindex == 0)\
		{ unboundfunctions += #name; unboundfunctions += "\n"; }\
	else _##name##_pointer = &(getglobalvariableas##type(_##name##_globalvariableindex));

Then make sure you do as the comment in UserFuncs.h says, namely add two lines, one for DECLARE_FLEXSIM_GLOBAL_VARIABLE, and one with the macro.

I copy this code to binding.h
#define DECLARE_FLEXSIM_GLOBAL_VARIABLE(name, type)\ int _##name##_globalvariableindex = getglobalvariableindex(#name);\ if(_##name##_globalvariableindex == 0)\ { unboundfunctions += #name; unboundfunctions += "\n"; }\ else _##name##_pointer = &(getglobalvariableas##type(_##name##_globalvariab leindex))

i want to use global varible variable1 in dll
and i add two lines in UserFuncs.h
DECLARE_FLEXSIM_GLOBAL_VARIABLE(variable1, Double)
#define var (*_variable1_pointer)
and i insert #include "UserFuncs.h"into the file FlexsimFuncs.h


but i also get error, what is wrong? attach is my dll maker ，i use vs2008 and flexsim 5.04.

Without looking into your attachment I see only "Double" instead of "double". This could be an error because C++ is case sensitive.

Greetings

Carsten

thanks,the problem have solved .but in flexsim the gui set global variable use Double.