How to register and un-register ActiveX
Controls
This tip describes how ActiveX controls can be registered and unregistered
directly from Visual Basic. Every ActiveX control contains two functions that can be
called that will instruct the OCX to either register or un-register itself with the
system. These functions are DLLRegisterServer and DLLUnregisterServer. The
following tip demonstrates how to register and un-register the Microsoft Common Controls
OCX, ComCtl32.OCX.
Declarations
Copy the following code into the declarations section of your projects.
Declare Function RegComCtl32 Lib
"ComCtl32.OCX" _
Alias "DllRegisterServer" () As Long Declare
Function UnRegComCtl32 Lib "ComCtl32.OCX" _
Alias "DllUnregisterServer" () As Long Const ERROR_SUCCESS = &H0
Code
To register the Microsoft Common Controls, use this code: If
RegComCtl32 = ERROR_SUCCESS Then
MsgBox "Registration Successful"
Else
MsgBox "Registration Unsuccessful"
End If
If UnRegComCtl32 = ERROR_SUCCESS Then
MsgBox "UnRegistration Successful"
Else
MsgBox "UnRegistration Unsuccessful"
End If
Note: Each
DLL function call may take up to 5 seconds.
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