how to call vb dll in vc++( iam using MFC) and vc6

CPallini

Member 3653751 wrote:

c:\mydll.dll

Member 3653751 wrote:

scdthndl.dll

Why different names?

Member 3653751 wrote:

pIncrement = (INCREMENTFUN)GetProcAddress((HMODULE)hLib, "StringToCSV"); // here its giving pIncrement = 0x0000000

Afterwards, you should call GetLastError() to obtain more info. Did you check what is the exported function name (you may use, for instance, the Depends tool)? :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]

KarstenK

the other comments are fully right to call the dll. But for string parameter you should use BSTR type. An article with basic explanations: Guide to BSTR and C String Conversions[^]

Press F1 for help or google it. Greetings from Germany

User 3650979

sorry.... by mistake i typed scdthndl.dll...if i give mydll.dll also same problem.... can u please help i want use vb dll in vc++

CPallini

Did you check the exported function name? Do you read the suggestions (mine and of the other folks?)? :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]

Adam Roderick J

Check whether scdthndl.dll is loaded, means hLib is having value or it is also 0?

Величие не Бога может быть недооценена.

User 3650979

hi i have vb activex dll...i want to use vc++...please help me.... HINSTANCE hLib; hLib = LoadLibrary(c:\scdthndl.dll"); pIncrement = (INCREMENTFUN)GetProcAddress((HMODULE)hLib, "StringToCSV"); pIncrement is giving 0x000000..

User 3650979

i checked exported function name....it is correct only... but its giveing NULL....

CPallini

Why didn't you call, as suggested, GetLastError?

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]

User 3650979

hi hlib have value...GetProcAddress() only Null coming please give me any suggestions....

Adam Roderick J

Then surely StringToCSV is not an exported function from that DLL check the depedency of the DLL, check if StringToCSV is shown in Exported functions.

Величие не Бога может быть недооценена.

Stephen Hewitt

As I told you before, verify the function is exported.

Steve