dll issue

[conanjou]

I practice to use one external dll as attached file.
and the code as below：
Macro Macro2

Code:

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typelib QMPlugin "D:\Bkgnd.dll"
QMPlugin.Bkgnd a._create

and QM shows that error message：

Dynamic-link library (DLL) initialization routine failed

and the code as below：

Macro Macro2

Code:

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typelib QMPlugin "D:\Bkgnd.dll"
QMPlugin.Bkgnd a.GetPixelColor(0 0 0)

and QM shows that error message：
interface pointer variable is 0

This is my first time to practice to use dll function, and I don't know how to solve them...