sheslop
asked on
calling a dll function that receives/returns a double from VB
hello,
im trying to pass a double type to a dll function that returns a double in VB. i get the error "bad Dll naming convention".
heres the VB function declaration:
Declare Function fnCPS_DateFormat Lib "CPS_DateFormat.dll" Alias "_fnCPS_DateFormat@8" (dblDate As Double) As Double
and heres the C++ function declaration:
extern "C" __declspec(dllexport) double WINAPI fnCPS_DateFormat(double dblDateDiff);
if the types are changed to int it works fine. is there something i need to do for i to work with doubles (pretty much 64 bit signed integers)
im trying to pass a double type to a dll function that returns a double in VB. i get the error "bad Dll naming convention".
heres the VB function declaration:
Declare Function fnCPS_DateFormat Lib "CPS_DateFormat.dll" Alias "_fnCPS_DateFormat@8" (dblDate As Double) As Double
and heres the C++ function declaration:
extern "C" __declspec(dllexport) double WINAPI fnCPS_DateFormat(double dblDateDiff);
if the types are changed to int it works fine. is there something i need to do for i to work with doubles (pretty much 64 bit signed integers)
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DanRollins
However, I did not test that against VB. -- Dan
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Axter
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No comment has been added lately, so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area that this question is:
Split between [DanRollins] and [Salte]
Please leave any comments here within the next seven days.
PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER!
Axter
EE Cleanup Volunteer
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