主题：拍照

在全局代码中参照例子写了如下代码，在窗口1中把iRetUSB = CVR_InitComm(iPort)换成iRetUSB = camInitCameraLib(iPort)却提示“编译错误，未定义camInitCameraLib”，这是什么原因？

Public Declare Function camInitCamerLib Lib "CmCapture.dll" Alias "camInitCameraLib" (ByVal Port As Integer) As Integer '连接设备
Public Declare Function camGetDevCount Lib "CmCapture.dll" Alias "camGetDevCount" () As Integer '验证身份证
Public Declare Function camGetDevName Lib "CmCapture.dll" Alias "camGetDevName" (ByVal Active As Integer) As Integer '读取身份证信息
Public Declare Function camOpenDev Lib "CmCapture.dll" Alias "camOpenDev" () As Integer '关闭设备
Public Declare Function camCloseDev Lib "CmCapture.dll" Alias "camCloseDev" () As Integer '关闭设备

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