@msdn=http://search.microsoft.com/search/results.aspx?qu=$$$ @pinvoke=http://pinvoke.net/$$$.htm Summary: TODO - a short description !!!!C# Signature: [DllImport("dtl.dll", SetLastError=true)] static extern public int DTL_UNDEF(int name_id); !!!!VB Signature: Declare Function DTL_UNDEF Lib "dtl.dll" (TODO) As TODO !!!!User-Defined Types: None. !!!!Alternative Managed API: Do you know one? Please contribute it! !!!!Notes: Dtl.dll functions are not thread safe. Multiple instances need to be in separate processes. !!!!Tips & Tricks: Please add some! !!!!Sample Code: /// <summary> /// Class dtl has all the p/invoke routines and /// error constants for the Rockwell DTL C sdk /// interface. /// </summary> public static class Dtl { /// <summary> /// Close Dtl driver /// </summary> /// <param name="driverId">specifies driver to close</param> /// <param name="timeOut">time out in milliseconds</param> /// <returns>dtl status</returns> public static int DtlDriverClose(int driverId, int timeOut) { new UIPermission(UIPermissionWindow.AllWindows).Demand(); return (UnsafeNativeMethods.DTL_DRIVER_CLOSE(driverId, timeOut)); } /// <summary> /// Uninitialize Dtl driver /// </summary> /// <param name="driverId">driver to uninitialize</param> public static void DtlUninit(int driverId) { new UIPermission(UIPermissionWindow.AllWindows).Demand(); UnsafeNativeMethods.DTL_UNINIT(driverId); } /// <summary> /// Initialize Dtl driver /// </summary> /// <param name="tableSize">number of entries in the definition table</param> /// <returns>dtl status</returns> public static int DtlInit(int tableSize) { new UIPermission(UIPermissionWindow.AllWindows).Demand(); return (UnsafeNativeMethods.DTL_INIT(tableSize)); } /// <summary> /// Returns message associated dtl status /// </summary> /// <param name="dtlSts">dtl status to lookup</param> /// <param name="msg">message corresponding to dtl status </param> /// <param name="buffSize">size of buffer that will hold message</param> public static void DtlErrorS(int dtlSts, StringBuilder msg, int buffSize) { new UIPermission(UIPermissionWindow.AllWindows).Demand(); UnsafeNativeMethods.DTL_ERROR_S(dtlSts, msg, buffSize); } /// <summary> /// Open Dtl Driver /// </summary> /// <param name="driverId">driver id to assign to this driver</param> /// <param name="driverName">name of the driver </param> /// <param name="timeOut">timeout in milliseconds</param> /// <returns>dtl status</returns> public static int DtlDriverOpen(int driverId, string driverName, int timeOut) { new UIPermission(UIPermissionWindow.AllWindows).Demand(); return (UnsafeNativeMethods.DTL_DRIVER_OPEN(driverId, driverName, timeOut)); } /// <summary> /// Get version of dtl dll /// </summary> /// <param name="versionText">string to hold returned text</param> /// <param name="maxCharsToReturn">size of string to hold version text</param> /// <returns>dtl status</returns> public static int DtlVersion(StringBuilder versionText, int maxCharsToReturn) { new UIPermission(UIPermissionWindow.AllWindows).Demand(); return (UnsafeNativeMethods.DTL_VERSION(versionText, maxCharsToReturn)); } /// <summary> /// Define a tag /// </summary> /// <param name="nameId">name id assigned to the tag</param> /// <param name="defString">string the defines the tag and its data</param> /// <returns>dtl status</returns> public static int DtlCDefine(ref int nameId, StringBuilder defString) { new UIPermission(UIPermissionWindow.AllWindows).Demand(); return (UnsafeNativeMethods.DTL_C_DEFINE(ref nameId, defString)); } /// <summary> /// Undefine a dtl tag /// </summary> /// <param name="nameId">name id of the tag</param> /// <returns>dtl status</returns> public static int DtlUndef(int nameId) { new UIPermission(UIPermissionWindow.AllWindows).Demand(); return (UnsafeNativeMethods.DTL_UNDEF(nameId)); } /// <summary> /// Read data from a dtl tag /// </summary> /// <param name="nameId">name id of the tag</param> /// <param name="readData">byte buffer to hold the data</param> /// <param name="ioStat">io status of the read operation</param> /// <param name="timeOut">timeout in milliseconds</param> /// <returns>dtl status</returns> public static int DtlReadW(int nameId, byte[] readData, ref uint ioStat, int timeOut) { new UIPermission(UIPermissionWindow.AllWindows).Demand(); return (UnsafeNativeMethods.DTL_READ_W(nameId, readData, ref ioStat, timeOut)); } /// <summary> /// Write to a dtl tag /// </summary> /// <param name="nameId">name id of the tag</param> /// <param name="writeData">data buffer to write from</param> /// <param name="ioStat">io status of the write operation</param> /// <param name="timeOut">timeout in milliseconds</param> /// <returns>dtl status</returns> public static int DtlWriteW(int nameId, byte[] writeData, ref uint ioStat, int timeOut) { new UIPermission(UIPermissionWindow.AllWindows).Demand(); return (UnsafeNativeMethods.DTL_WRITE_W(nameId, writeData, ref ioStat, timeOut)); } /// <summary> /// Contains unsafe dtl dll calls /// </summary> [SuppressUnmanagedCodeSecurityAttribute] internal static class UnsafeNativeMethods { [DllImport("Dtl32.dll")] static extern public int DTL_DRIVER_CLOSE(int driver_id, int timeout); [DllImport("Dtl32.dll")] static extern public void DTL_UNINIT(int driver_id); [DllImport("Dtl32.dll")] static extern public int DTL_INIT(int table_size); [DllImport("Dtl32.dll")] static extern public void DTL_ERROR_S(int iostat, StringBuilder msg, int buffsz); [DllImport("Dtl32.dll")] static extern public int DTL_DRIVER_OPEN(int driver_id, string szDriverName, int timeout); [DllImport("DTL32.DLL")] static extern public int DTL_VERSION(StringBuilder sb, int maxChars); [DllImport("DTL32.DLL")] static extern public int DTL_C_DEFINE(ref int name_id, StringBuilder def); [DllImport("DTL32.DLL")] static extern public int DTL_UNDEF(int name_id); [DllImport("DTL32.DLL")] static extern public int DTL_READ_W(int name_id, byte[] data, ref uint iostat, int timeout); [DllImport("DTL32.DLL")] static extern public int DTL_WRITE_W(int name_id, byte[] data, ref uint iostat, int timeout); } } public bool UndefineData() { int dtlSts = Dtl.DtlUndef(_nameId); return (dtlSts == DtlSuccess); } Documentation: DTL_UNDEF@msdn on MSDN
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