Visual basic

I have a code written in C and Visual basic . I have compiled, run and created a DLL file using the C code. However when i tried to run the visual basic code, it gave me an error message:
Can't find the DLL. But the DLL file has been created and placed in the C:\WINNT directory. Anybody who could be able to help me solving this issue , would be a big help.Can't fine the DLL

A couple of things here:
1) Your subject title is unacceptable. You can view the sticky thread at the top of this forum for more information on how to post a question.

2) It would be helpful if you show the declaration code you used to declare the dll function call.

Also, did you register the dll?

How do I register dll??

Usually your installer will register an ActiveX component. Manually register a component using regsvr32 <path\dllname>

If your dll is not an activeX I believe you'll need to use a function declaration similar to the way you declare a windows api function.

how do you locate, or fine DLLRegister Server entry point?

Correction.
How do you find or locate DLLRegister Server entry point?

after you registered your DLL.. did you make a reference to it in your VB App? if not, then go to Project/References, and select your DLL's name and then click ok. --- Did you manage to get it registed using RegSvr32?

if your dll isn't a Activex dll,You must add some declare before the vb code just like winapi..sample as:
Declare Function gethostbyname Lib "WSOCK32" (ByVal szHost As String) As Long

And then use your declared dll function:
'In a form
Private Sub Form_Load()
dim ipadd as long
ipadd=gethostbyname("host1")
......