WriteProcessMemory error 5
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X| when excuting this (procID is a control panel applet) HANDLE lView=OpenProcess(PROCESS_ALL_ACCESS,false,procID); if (lView) { if ( !LookupPrivilegeValue(NULL,SE_DEBUG_NAME,&tokenLuid ) ) j=GetLastError(); tokenPriv.PrivilegeCount = 1; tokenPriv.Privileges[0].Luid = tokenLuid; tokenPriv.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; tokenHandle=NULL; if (!OpenProcessToken(lView,TOKEN_ADJUST_PRIVILEGES,&tokenHandle)) j=GetLastError(); if ( !AdjustTokenPrivileges(tokenHandle,FALSE,&tokenPriv,sizeof(TOKEN_PRIVILEGES) , (PTOKEN_PRIVILEGES) NULL, (PDWORD) NULL) ) j=GetLastError(); // Allocate virtual memory for ListView LVITEM *_lvi=(LVITEM*)VirtualAllocEx(lView, NULL, sizeof(LVITEM),MEM_COMMIT, PAGE_READWRITE); if (!VirtualQueryEx(lView,_lvi,&memBasicInfo,sizeof(MEMORY_BASIC_INFORMATION))) j=GetLastError(); no errors are triggered, memBasicInfo returns the correct parameters, ie i have full access to the allocated memory. But if i follow it up by: if (WriteProcessMemory(lView, _lvi, &lvi, sizeof(LVITEM),&byteCount)) j=GetLastError(); i still get error 5, but bytecount gives the correct count. I disabled the antivirus scanner, so it's not interfering I am flabbergasted.
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X| when excuting this (procID is a control panel applet) HANDLE lView=OpenProcess(PROCESS_ALL_ACCESS,false,procID); if (lView) { if ( !LookupPrivilegeValue(NULL,SE_DEBUG_NAME,&tokenLuid ) ) j=GetLastError(); tokenPriv.PrivilegeCount = 1; tokenPriv.Privileges[0].Luid = tokenLuid; tokenPriv.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; tokenHandle=NULL; if (!OpenProcessToken(lView,TOKEN_ADJUST_PRIVILEGES,&tokenHandle)) j=GetLastError(); if ( !AdjustTokenPrivileges(tokenHandle,FALSE,&tokenPriv,sizeof(TOKEN_PRIVILEGES) , (PTOKEN_PRIVILEGES) NULL, (PDWORD) NULL) ) j=GetLastError(); // Allocate virtual memory for ListView LVITEM *_lvi=(LVITEM*)VirtualAllocEx(lView, NULL, sizeof(LVITEM),MEM_COMMIT, PAGE_READWRITE); if (!VirtualQueryEx(lView,_lvi,&memBasicInfo,sizeof(MEMORY_BASIC_INFORMATION))) j=GetLastError(); no errors are triggered, memBasicInfo returns the correct parameters, ie i have full access to the allocated memory. But if i follow it up by: if (WriteProcessMemory(lView, _lvi, &lvi, sizeof(LVITEM),&byteCount)) j=GetLastError(); i still get error 5, but bytecount gives the correct count. I disabled the antivirus scanner, so it's not interfering I am flabbergasted.
Why are you calling
GetLastErroronWriteprocessMemorysuccess? :)If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles] -
X| when excuting this (procID is a control panel applet) HANDLE lView=OpenProcess(PROCESS_ALL_ACCESS,false,procID); if (lView) { if ( !LookupPrivilegeValue(NULL,SE_DEBUG_NAME,&tokenLuid ) ) j=GetLastError(); tokenPriv.PrivilegeCount = 1; tokenPriv.Privileges[0].Luid = tokenLuid; tokenPriv.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; tokenHandle=NULL; if (!OpenProcessToken(lView,TOKEN_ADJUST_PRIVILEGES,&tokenHandle)) j=GetLastError(); if ( !AdjustTokenPrivileges(tokenHandle,FALSE,&tokenPriv,sizeof(TOKEN_PRIVILEGES) , (PTOKEN_PRIVILEGES) NULL, (PDWORD) NULL) ) j=GetLastError(); // Allocate virtual memory for ListView LVITEM *_lvi=(LVITEM*)VirtualAllocEx(lView, NULL, sizeof(LVITEM),MEM_COMMIT, PAGE_READWRITE); if (!VirtualQueryEx(lView,_lvi,&memBasicInfo,sizeof(MEMORY_BASIC_INFORMATION))) j=GetLastError(); no errors are triggered, memBasicInfo returns the correct parameters, ie i have full access to the allocated memory. But if i follow it up by: if (WriteProcessMemory(lView, _lvi, &lvi, sizeof(LVITEM),&byteCount)) j=GetLastError(); i still get error 5, but bytecount gives the correct count. I disabled the antivirus scanner, so it's not interfering I am flabbergasted.
GetLastError() returns the last error that occurred, which didn't necessarily happen in the last function call. That is way it is called GetLastError() and not GetError(). You normally want to stop a sequence of operations at the first error, so you could and should structure your code like this:
result=callFunction1();
if (result==OK) result=callFunction2();
if (result==OK) result=callFunction3();
if (result!=OK) log("it went wrong; error = ", GetLastError());:)
Luc Pattyn [Forum Guidelines] [My Articles]
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Why are you calling
GetLastErroronWriteprocessMemorysuccess? :)If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]the call doesn't complete..... The bytecount written is correct, but the memory addressed by the call stays empty. Also in MSDN is stated that a Write call my fail whilst still returning no fail error code. After doing a sendmessage LVM_GetItemState to listView, the call returns empty as well. So the memory location seems to be inacessible, which is bizarre because i also have this: lvi.pszText=_item; WriteProcessMemory(lView, _lvi, &lvi, sizeof(LVITEM), NULL); SendMessage(listView, LVM_GETITEMTEXT, NULL, (LPARAM)_lvi); ReadProcessMemory(lView, _item, item, 512, NULL); and that returns with the correct itemtext......
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GetLastError() returns the last error that occurred, which didn't necessarily happen in the last function call. That is way it is called GetLastError() and not GetError(). You normally want to stop a sequence of operations at the first error, so you could and should structure your code like this:
result=callFunction1();
if (result==OK) result=callFunction2();
if (result==OK) result=callFunction3();
if (result!=OK) log("it went wrong; error = ", GetLastError());:)
Luc Pattyn [Forum Guidelines] [My Articles]
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tnx for the input, but the original code is spiked with GetLastErrors, took some out to shorten code for viewing.
Yeah, great. When the error handling code indicates some problem, show us fictitious code. Someone will make the right guess anyhow? :~
Luc Pattyn [Forum Guidelines] [My Articles]
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Yeah, great. When the error handling code indicates some problem, show us fictitious code. Someone will make the right guess anyhow? :~
Luc Pattyn [Forum Guidelines] [My Articles]
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They must protect their brilliant code against industrial espionage, my friend. :rolleyes:
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles] -
They must protect their brilliant code against industrial espionage, my friend. :rolleyes:
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles] -
:~ found it: Microsoft Windows Vista and later. When a message is blocked by UIPI the last error, retrieved with GetLastError, is set to 5 (access denied). took me a full week to discover this tidbit. Tnx MS
Good: tenacity wins, eventually. :)
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]