910: RapiEnumRegistryThreadcs from the RegShowStartup Program in VS .NET

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Listing 910: RapiEnumRegistryThreadcs from the RegShowStartup Program
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// Program Name: RegShowStartupexe // // File Name: RapiEnumRegistryThreadcs - Creates a thread to
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enumerate both registry keys and registry values Code from _NET Compact Framework Programming with C#_ and _NET Compact Framework Programming with Visual Basic NET_ Authored by Paul Yao and David Durant
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System; SystemThreading; SystemWindowsForms; SystemRuntimeInteropServices; YaoDurantWin32;
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namespace RegShowStartup { // Reasons our thread invokes user interface thread public enum INVOKE_ENUMREG { ENUMREG_NEWKEY, ENUMREG_NEWVALUE, ENUMREG_ENDED, STATUS_MESSAGE } /// <summary> /// RapiConnection - Manages ActiveSync RAPI connections /// </summary> public class RapiEnumRegistryThread { public string strBuffer; // Interthread buffer public INVOKE_ENUMREG itReason; // Interthread reason // Public thread to allow monitoring by UI thread public Thread thrd = null; // The contained thread private Control m_ctlInvokeTarget; // Interthread control private EventHandler m_deleCallback; // Interthread delegate // Private data private bool m_bContinue; private bool m_bKeys; private IntPtr m_hkeyRoot; private string m_strRegNode;
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Continue flag Enumerate keys or values Root enumeration key Root enumeration node
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public bool bThreadContinue // Continue property { get { return m_bContinue; } set { m_bContinue = value; } } public RapiEnumRegistryThread(
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Control ctl, EventHandler dele, bool bKeys, IntPtr hkeyRoot, string strRegNode) { // Make private copies of init data m_ctlInvokeTarget = ctl; m_deleCallback = dele; m_bKeys = bKeys; m_hkeyRoot = hkeyRoot; m_strRegNode = strRegNode; bThreadContinue = true; } public bool Run() { ThreadStart ts = null; ts = new ThreadStart(ThreadMainEnumReg); if (ts == null) return false; thrd = new Thread(ts); thrdStart(); return true; } // // // // // Who to call Notification delegate Enum keys or values Root of search Node to search
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/// <summary> /// ThreadMainEnumReg - Enumerate registry values /// </summary> private void ThreadMainEnumReg() { // Open registry key IntPtr hkeySearchNode = IntPtrZero; int iResult = RapiCeRegOpenKeyEx( thism_hkeyRoot, thism_strRegNode, 0, 0, ref hkeySearchNode); if (iResult != RapiERROR_SUCCESS && m_bContinue) { // Send error message itReason = INVOKE_ENUMREGSTATUS_MESSAGE; strBuffer = "Error accessing registry key"; thism_ctlInvokeTargetInvoke(m_deleCallback); // Trigger end of enumeration itReason = INVOKE_ENUMREGENUMREG_ENDED; thism_ctlInvokeTargetInvoke(m_deleCallback);
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// Trigger that shutdown is complete thrd = null; return; } // Keys or values if (thism_bKeys) // Enumerate keys { int iIndex = 0; while (iResult == RapiERROR_SUCCESS && m_bContinue) { string strKeyName = new string('\0', 32); int cbLength = 32; iResult = RapiCeRegEnumKeyEx( hkeySearchNode, iIndex++, strKeyName, ref cbLength, 0, 0, 0, 0); if (iResult == RapiERROR_SUCCESS && m_bContinue) { itReason = INVOKE_ENUMREGENUMREG_NEWKEY; strBuffer = strKeyName; thism_ctlInvokeTargetInvoke(m_deleCallback); } } // while } else // Enumerate values { int iIndex; for (iIndex = 0; iResult == RapiERROR_SUCCESS && m_bContinue; iIndex++) { int cbName = 32; string strName = new string('\0', 16); RapiREGTYPE iType = 0; int cbLength = 0; // Enumerate key names only (not values) iResult = RapiCeRegEnumValue(hkeySearchNode, iIndex, strName, ref cbName, IntPtrZero, ref iType, IntPtrZero, ref cbLength); if (iResult == RapiERROR_SUCCESS && m_bContinue) { if (iType == RapiREGTYPEREG_SZ) // string { int cbData=32; string str = new string(new char[cbData]); RapiCeRegQueryValueEx(hkeySearchNode, strName, 0, ref iType, str,
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ref cbData); char [] ach = {'\0'}; strBuffer = strNameTrim(ach) + " = " + strTrim(ach); } else if (iType == RapiREGTYPEREG_BINARY) { // Fetch binary array of short values char [] ach = {'\0'}; strBuffer = strNameTrim(ach) + " = "; // Allocate buffer of short values Int16 sh = 0; IntPtr iptr; int cbSizeOfShort = MarshalSizeOf(sh); int cbData = cbSizeOfShort * 5; iptr = MarshalAllocCoTaskMem(cbData); // Fetch array of short values RapiCeRegQueryValueEx(hkeySearchNode, strName, 0, ref iType, iptr, ref cbData); // Copy array to managed array int cElements = cbData / cbSizeOfShort; Int16 [] ash = new Int16 [cElements]; MarshalCopy(iptr, ash, 0, cElements); MarshalFreeCoTaskMem(iptr); // Add values to string for display for (int i = 0; i < cElements; i++) { strBuffer = strBuffer + ash[i] + " "; } } else { strBuffer = strName + " not expected type"; } itReason = INVOKE_ENUMREGENUMREG_NEWVALUE; thism_ctlInvokeTargetInvoke(m_deleCallback); } } // for } // if RapiCeRegCloseKey(hkeySearchNode); // Trigger end of enumeration itReason = INVOKE_ENUMREGENUMREG_ENDED; thism_ctlInvokeTargetInvoke(m_deleCallback);
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