C / C++ / MFC

antonio343 wrote:

, I get a error that it said:
You dont have acces to this file.

CFile::modeReadWrite OR CFile::modeWrite

<pre>쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌쳌﫸Y쳌쳌쳌쳌꣨ɷ쳌쳌偁泇¬</pre>

void CDlgResultados::loadFromFile(void)
{
	CString path= GetUserHomeDir() + _T("\\Documents\\file.txt");
	
	CStdioFile f1;
	f1.Open(path, CFile::modeCreate | CFile::modeRead || CFile::typeText);
	
	CStdioFile f(stdin);
	TCHAR buf[100];

	f1.ReadString(buf, 99);

	m_Edit.SetWindowTextW(buf);
}

1. Create the file with access for writing
2. Write some text either from a constant string, or from some data built by the program
3. Close the file
4. Open the file with access for reading
5. Read the text into a buffer
6. Close the file

antonio343 wrote:

f1.Open(path, CFile::modeCreate | CFile::modeRead || CFile::typeText);
TCHAR buf[100];
f1.ReadString(buf, 99);

if ( myFile.Open(path, CFile::modeCreate | CFile::modeRead ) )

pandit84 wrote:

Is there any API which gives me list of Seial Ports available on system.

pandit84 wrote:

QueryDosDevice () but its failed to provide any result .

#include <iostream>
#include <windows.h>

void main(){
   char port_name[16];
     for (int port_number = 1; port_number < 256; ++port_number)
     {
         port_number < 10 ?
             sprintf(port_name, "COM%d", port_number) :
             sprintf(port_name, "\\\\.\\COM%d", port_number);
         HANDLE hFile = ::CreateFile(port_name,
             GENERIC_READ | GENERIC_WRITE, 0, NULL,
             OPEN_EXISTING, 0, NULL);
         if(hFile != INVALID_HANDLE_VALUE)
             std::cout << port_name << std::endl;
         else
         {
             DWORD err = GetLastError();
             if (err == ERROR_ACCESS_DENIED ||
                 err == ERROR_SHARING_VIOLATION)
                 std::cout << port_name << std::endl;
         }
         CloseHandle(hFile);
     }

}