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Can someone please show me, by code example, how to cause Windows Exployer to open on call in a program and to open a specific file.
Your code example would be deeply appreciated.
A C++ programming language novice, but striving to learn
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FYI some C# code that opens an explorer window and highlights the
file specified by string fileSpec:
Process proc=new Process();
proc.StartInfo.FileName="Explorer.exe";
proc.StartInfo.Arguments="/n,/select,"+fileSpec;
proc.StartInfo.CreateNoWindow=true;
proc.StartInfo.UseShellExecute=false;
proc.Start();
and some C# code that opens a file as if you double-clicked it on the Windows desktop:
Process proc=new Process();
proc.StartInfo.FileName=fileSpec;
proc.StartInfo.Arguments=null;
proc.StartInfo.CreateNoWindow=true;
proc.StartInfo.UseShellExecute=false;
proc.Start();
I know it is C#, not C++, but under .NET it is basically the same.
Luc Pattyn
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I know nothing about c#; and as you may have gathered, I know very little about c++. I am learning!
I need real, working c++ code to understand what to do.
Please try to understand, I am a novice to c++, but I desparately wan to learn how to do things CORRECTLY!
I have no idea if c++ has a "key word" or "token" named "Process".
Thanks anyway,
Larry A Mills Sr
A C++ programming language novice, but striving to learn
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The C# code is the eqivelant of using the Windows API CreateProcess() to launch Explorer.exe
and have it open with the specified file highlighted:
STARTUPINFO StartupInfo;
memset(&StartupInfo, 0, sizeof(STARTUPINFO));
StartupInfo.cb = sizeof(STARTUPINFO);
StartupInfo.dwX = 100;
StartupInfo.dwY = 100;
StartupInfo.dwXSize = 400;
StartupInfo.dwYSize = 400;
PROCESS_INFORMATION ProcessInfo;
TCHAR szCommandLine[260];
_tcscpy(szCommandLine, _T("explorer.exe /select,"));
_tcscat(szCommandLine, _T("C:\\AUTOEXEC.BAT"));
if (::CreateProcess(NULL,
szCommandLine,
NULL,
NULL,
FALSE,
NORMAL_PRIORITY_CLASS,
0,
NULL,
&StartupInfo,
&ProcessInfo))
{
::CloseHandle(ProcessInfo.hProcess);
::CloseHandle(ProcessInfo.hThread);
}
else
{
DWORD err = ::GetLastError();
}
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On an "Install program I want to give the User the choice of installing the 1) Data Folder on their computer (without installing a Desktop Icon(shortcut)), 2) Install all the Data Folders (with a Desktop Icon), 3) Install a Desktop Icon(shortcut) only for drive "d:\", or 4) view the files from Windows Exployer.
I must be able to have Windows Exployer begin running with the selected file being loaded up if the User selects the 4th option.
Will the code you sent do option 4 as is?
A C++ programming language novice, but striving to learn
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Larry Mills Sr wrote: Will the code you sent do option 4 as is?
This line needs to be changed
_tcscat(szCommandLine, _T("C:\\AUTOEXEC.BAT"));
I've hardwired it to highlight C:\AUTOEXEC.BAT since it was a file that probably exists on your
system so if you tried the code it would work.
You'll want to copy the actual pathname of the file/folder you wish to be highlighted when explorer
starts.
Mark
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Please remember my last email.
I will only use Exployer IF the User selects it. I wouldn't want Exployer to run at any other time.
How do I make sure this happens!
Please excuse my ignorance.
A C++ programming language novice, but striving to learn
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Let me make sure I've got this right - this is an install program you are writing with C/C++
correct?
The user will be presented with 4 options as outlined in the above post.
If option 4 is chosen then the user can choose a location to store the files?
Or is it the location for a folder?
What do you want explorer to default to? The files to install or where the files should go?
How you give the user the 4 choices will determine which processing gets done. You'd only
call/use the explorer code if the user chooses option 4, based on their selection.
Mark
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I'm using VC6 and have no idea what is causing this problem. Normally if you compile a blank windows app you get a lot of imports from kernel32. I believe that this is because the CRT uses them to initialize.
The problem is as soon as I use ANY api from kernel32 all these are lost and I end up with the 1 API I use. Causing the app to crash in the CRT (before WinMain)!
Has anyone seen this happen before, know a solution/workaround or have any idea what is causing it? If I don't use any imports form kernel32 the ones used by the CRT are there and the app runs. 
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In my program, I need a structure which looks like:
<br />
struct stru_A{<br />
char Name[MAX_LEN];<br />
float score;<br />
}<br />
Moreover, I declare a vector variable of type stru_A to hold Name_Score pairs. My problem arises with the member variable 'Name'.
<br />
vector 'struct stru_A' Name_Score_Collection;<br />
<br />
In the above declaration of stru_A, the size of Name, MAX_LEN, is predefined to be 30(#define MAX_LEN 30, to hold the longest name in my database). However, in the database many peoples' name are much less than 30 letters. Hence, much valuable memory space are wasted. I wonder what's the way to solve this problem.
I have tried with a string variable. It is true it can solve this problem. However, in the later part of my program I need to write each struture in vector Name_Score_Collection into a file on my hard disk. I used CFile::write() to accompolish this. CFile::write() worked fine with 'char Name[MAX_LEN]', but not with 'std::string Name'. I think this is because function write() need to know the exact size for each structure to be write out. The size of a string variable is not fixed.
-- modified at 9:29 Saturday 16th December, 2006
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Use a CString/std::string instead?
Or use a map of names/scores:
std::map<std::string, float> aMap
aMap["cy163"] = 100.00;
Or even a std::vector of std::pair:
std::vector<std::pair<std::string, float> > myVec;
myVec.push_back(std::make_pair("cy163", 100.00));
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Much better answer than mine. It's what I get for working in an MFC house.
Software Zen: delete this;
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I have tried with a string variable. It is true it can solve this problem. However, in the later part of my program I need to write each struture in vector Name_Score_Collection into a file on my hard disk. I used CFile::write() to accompolish this. CFile::write() worked fine with 'char Name[MAX_LEN]', but not with 'std::string Name'. I think this is because function write() need to know the exact size for each structure to be write out. The size of a string variable is not fixed. But, I am not sure about this.
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You will need to store the size of each string, the string data, and then the float. More complicated than simply writing an entire structure to disk but a worthwhile exercise nonetheless.
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Not to steal your thunder Rob... The following works under VC6.0 also (and stays within the standard C++ library). See std::string widen() and std::wstring narrow()[^]
Jeff
std::string StringNarrow( const std::wstring& wide ) {
typedef std::ctype<wchar_t> CT;
std::string narrow;
narrow.resize( wide.length() );
CT const& ct = std::_USE(std::locale(), CT);
ct.narrow( &wide[0], &wide[0] + wide.length(), '_', &narrow[0] );
return narrow;
}
std::wstring StringWiden( const std::string& narrow ) {
typedef std::ctype<wchar_t> CT;
std::wstring wide;
wide.resize( narrow.length() );
CT const& ct = std::_USE(std::locale(), CT);
ct.widen(&narrow[0], &narrow[0] + narrow.length(), &wide[0]);
return wide;
}
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Very useful. All my string widening/narrowing is done using MS specifics likes WideCharToMultiByte.
Not sure how it helps the OP though! 
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Since you're already using the STL vector class, why not use it's string class?
Software Zen: delete this;
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I have tried with a string variable. It is true it can solve this problem. However, in the later part of my program I need to write each struture in vector Name_Score_Collection into a file on my hard disk. I used CFile::write() to accompolish this. CFile::write() worked fine with 'char Name[MAX_LEN]', but not with 'std::string Name'. I think this is because function write() need to know the exact size for each structure to be write out. The size of a string variable is not fixed.
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Maybe is worth that you give a look to Serialization Topics in MSDN.
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.
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I dont think you will get a problem there. Because, when you are going to write a structure variable into a file, you will just be saying sizeof(stObj), so what's the problem in "not knowing" the the size of the string variable. Or if you want to trim something out within a limited lenght you can always check for stdMyString.size() and do it.
:Gong: 歡迎光臨 吐 西批 :Gong:
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Hi Cy163,
> char Name[MAX_LEN], but not with std::string Name...
How so?
std::string Name
Name.c_str();
...
or
std::wstring Name
Name.c_str();
...
The following works under VC6.0 also (and stays within the standard C++ library). See std::string widen() and std::wstring narrow()[^]
Jeff
std::string StringNarrow( const std::wstring& wide ) {
typedef std::ctype<wchar_t> CT;
std::string narrow;
narrow.resize( wide.length() );
CT const& ct = std::_USE(std::locale(), CT);
ct.narrow( &wide[0], &wide[0] + wide.length(), '_', &narrow[0] );
return narrow;
}
std::wstring StringWiden( const std::string& narrow ) {
typedef std::ctype<wchar_t> CT;
std::wstring wide;
wide.resize( narrow.length() );
CT const& ct = std::_USE(std::locale(), CT);
ct.widen(&narrow[0], &narrow[0] + narrow.length(), &wide[0]);
return wide;
}
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store only a pointer, inside the structure, such as
struct stru_B {
char * lpszName;
float score;
};
then, of course, you need to deal with memory allocation/deallocation.
Alternatively include STL string or MFC CString into the struct.
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.
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this method is problematic with CFile.read(), since sizeof(struct_B) is not fixed.
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cy163@hotmail.com wrote: this method is problematic with CFile.read(), since sizeof(struct_B) is not fixed.
That's is inevitable because you want to save variable-lenght chunks of data. You have to store the true struct lenght too (and before storing actual struct). There are several ways to do that. Again, maybe better to give a look at Serialization of MSDN.
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.
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Call string::size() to get the length of the string.
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