C / C++ / MFC

J_E_D_I wrote:

Is it possible to read and write to and from very specific locations leving the rest unchanged?

cTemp[0] = cBuffer[0];

strcpy(cTemp,cBuffer);

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<br />
char cTemp[260]; //For temporary stringwork.<br />
char cTemp2[260]; //WTF???<br />
char cBuffer[256]; //To read data from the file.<br />
<br />
//This is where I save something into cTemp.<br />
GetModuleFileName(0, cTemp, 249);<br />
<br />
//And this is where I save something into cBuffer.<br />
ReadFile(hFile, cBuffer, sizeof(char)*256, &dwNumRead, NULL);<br />
<br />
strcpy(cTemp2, cBuffer); //Crashes.<br />
strcpy(cTemp, cBuffer); //Also crashes.<br />
<br />

<br />
char cTemp2[260]; //WTF???	<br />
strcpy(cTemp2, cBuffer); //It works!!!.<br />
sTemp = cTemp2;<br />

<br />
<br />
//Entry point.<br />
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)<br />
{<br />
	ASDANSIString sTemp; //For temporary stringwork.<br />
	HANDLE hFile; //The file to read the window title from.<br />
	MSG msgPump; //For dispatching OS messages.<br />
	DWORD dwNumRead; //Number of bytes read from the file.<br />
	long lCounter;<br />
	char cTemp[260]; //For temporary stringwork.<br />
	<br />
	char cBuffer[256]; //To read data from the file.<br />
<br />
	bReady = false; //Initializing.<br />
	lTimerID = SetTimer(0, 0, 1000, (TIMERPROC)TimerProc); //Launching timer.<br />
<br />
	//Retrieving the name of the window to close from the file..<br />
	GetModuleFileName(0, cTemp, 249); //Getting this module's path (the executable full name and path).<br />
	sTemp = cTemp; //From now on using the ASDANSIString object to work with the path.<br />
	sTemp = sTemp.SubStringA(0, sTemp.IndexOfRev("\\", 0)); //Copying only until the last backslash.<br />
	sTemp += "\\Window Name.txt"; //Adding the name of the file to open.<br />
<br />
	//Opening the file which contains the window name and reading the window name from it.<br />
	hFile = CreateFile(sTemp, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);	<br />
	ReadFile(hFile, cBuffer, sizeof(char)*256, &dwNumRead, NULL);<br />
	CloseHandle(hFile);<br />
<br />
	char cTemp2[260]; //WTF???<br />
	strcpy(cTemp2, cBuffer);<br />
	sTemp = cTemp2;<br />
<br />
	MessageBox(0, sTemp, "Test", 0);<br />
<br />
 	while (!bReady && GetMessage(&msgPump, NULL, 0, 0)) //Pumping messages, but only while the timer is still active.<br />
	{<br />
		TranslateMessage(&msgPump);<br />
		DispatchMessage(&msgPump);<br />
	}<br />
<br />
 	return 0;<br />
}<br />
<br />

char cBuffer[256] = { 0 };  // fill with nuls

Axonn Echysttas wrote:

ReadFile(hFile, cBuffer, sizeof(char)*256, &dwNumRead, NULL);

ReadFile(hFile, cBuffer, sizeof(char)*256, &dwNumRead, NULL);
cBuffer[dwNumRead] = '\0';
strcpy(cTemp2,cBuffer);