得到double类型的系统变量
[id(146), helpstring("method GetSysVarDouble")] VARIANT_BOOL GetSysVarDouble(BSTR pszVarName, DOUBLE* pRet);
例如: JS
var pRet = mxOcx.Call("GetSysVar","ORTHOMODE"); if(pRet != null) { var iOrthoMode = pRet.AtLong(1); alert(iOrthoMode); }