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QuestionHow to send messages from pc to pc in LAN without turning 'Messenger' service on? Pin
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GeneralRe: How to send messages from pc to pc in LAN without turning 'Messenger' service on? Pin
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Questionshell COM problems with Vista Pin
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AnswerRe: shell COM problems with Vista Pin
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GeneralRe: shell COM problems with Vista Pin
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GeneralRe: shell COM problems with Vista Pin
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GeneralRe: shell COM problems with Vista Pin
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QuestionHow to use collection object as interface method parameter in .NET Pin
Chiman111-Dec-09 17:41
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QuestionUnable to cast COM object of type 'magic.magicClass' to interface type 'magic.Dmagic'. Pin
Chrispie1239-Dec-09 23:27
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AnswerRe: Unable to cast COM object of type 'magic.magicClass' to interface type 'magic.Dmagic'. Pin
Richard MacCutchan10-Dec-09 2:35
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AnswerRe: Unable to cast COM object of type 'magic.magicClass' to interface type 'magic.Dmagic'. Pin
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QuestionHow to hide one of the pins in the DirectShow Source Filter ? Pin
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QuestionExcel.exe is not getting killed implicitly Pin
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AnswerRe: Excel.exe is not getting killed implicitly Pin
serzh8316-Dec-09 5:21
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Questionusing interface Pin
Chiman15-Dec-09 1:09
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AnswerRe: using interface Pin
Jonathan Davies5-Dec-09 5:03
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AnswerRe: using 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
mveKarstenK14-Dec-09 22:48 

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