高手：dll--找不到入口？

[studentcom]

用bcb写的dll：
extern "C" __declspec(dllexport) int PlusNum(int X, int Y)
{
return X+Y;
}

// 两个整数相减

已经编译成DLL.dll，放在C:\WINDOWS\SYSTEM\里，可在vb里调用时却提示：找不到C:\WINDOWS\SYSTEM\DLL1.dll入口！

Private Declare Function PlusNum Lib "C:\WINDOWS\SYSTEM\DLL1.dll" (intX As Integer, _
intY As Integer) As Integer

Private Sub Command1_Click()
Dim intReturnedValue As Integer

intReturnedValue = PlusNum(10, 20)


End Sub


到底哪有问题？

[shawls]

Private Declare Function PlusNum Lib "DLL1.dll" (intX As Integer, _
intY As Integer) As Integer

path in regter

[small_wei]

添加一个.DEF文件：
LIBRARY MYDLL
EXPORTS
PlusNum