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AnswerRe: Unable to cast COM object of type 'magic.magicClass' to interface type 'magic.Dmagic'. Pin
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Questionusing interface Pin
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QuestionCalling Com object From C# to add 2 numbers Pin
Chrispie1232-Dec-09 7:47
Chrispie1232-Dec-09 7:47 
Good Morning,
I need to call a dll from C# that was generated by magic edeveloper. I think it is a C dll.
It is a program that takes in 3 parameters all integers. Adds the first to and pass the sum to the 3rd parameter.
I have registered the dll in windows and I can add a reference in visual studio via the Project  Add Reference menu.
I have the following code in my project
int a = 5;
int b = 6;            
int sum = 0;
double sumDouble = 0;
sumdll.sumdllClass sdc = new sumdll.sumdllClass();
sumDouble = sdc2.sumdll(ref a, ref b, ref sum);

But if I run it I get the error
Unable to cast COM object of type 'sumdll.sumdllClass' to interface type 'sumdll.Dsumdll'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{3DC9FCBA-9E72-49AA-B597-F9B2603D5EEA}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)).

the following is available from the intellisense
sumdll.sumdllClass sdc = new sumdll.   
	Dsumdll  		which is an interface
	Sumdll		which is an interface
	sumdllClas		which is a class

And in the line
sumDouble = sdc2.sumdll(
			ref int input1, ref int input2, ref @input)

Does anyone know I am getting this error? Or how to call the dll correctly.
Regards,
Christiaan Pieters
AnswerRe: Calling Com object From C# to add 2 numbers Pin
Chrispie1233-Dec-09 18:32
Chrispie1233-Dec-09 18:32 
AnswerRe: Calling Com object From C# to add 2 numbers Pin
KarstenK14-Dec-09 22:48
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AnswerRe: Calling Com object From C# to add 2 numbers Pin
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professionalMd. Marufuzzaman15-Dec-09 4:04 
QuestionIs it possible to attach the manifest info to a dll for SxS? Pin
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QuestionUsing COM component invalid pointer error Pin
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AnswerRe: Using COM component invalid pointer error Pin
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GeneralRe: Using COM component invalid pointer error Pin
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GeneralRe: Using COM component invalid pointer error Pin
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GeneralRe: Using COM component invalid pointer error Pin
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QuestionCOM Error: error LNK2001: unresolved external symbol "public: virtual long __stdcall Pin
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Questionnew to COM Pin
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