C / C++ / MFC

// When user presses the start button
void DataCryptMain ::ProcessCrypt()
{
...
cryptthread.Start(_staticThreadProc, this)
...
}

// Crypt procedures
DWORD WINAPI _staticThreadProc(LPVOID lpData)
{
DataCryptMain *dcr = reinterpret_cast<datacryptmain>(lpData);
return dcr->CryptThreadProc(NULL);
}

DWORD WINAPI DataCryptMain::CryptThreadProc(LPVOID lpData)
{
int iErrorOrInfo = INFO_PROCESS_DONE;

// Ciphering stuff
iErrorOrInfo = CryptoRijnDaelProcess();

Notify_Progress_GUI(NOTIFY_PROGRESS_END, NULL, iErrorOrInfo);

return 0;
}

// Notify GUI
void DataCryptMain::Notify_Progress_GUI(int iNotificationType, WPARAM wParam, LPARAM lParam)
{

if (iNotificationType == NOTIFY_PROGRESS_RUNNING)
{
PostMessage(hWnd, WM_PROGRESS_RUNNING, wParam, lParam);
}
else
{
PostMessage(hWnd, WM_PROGRESS_END, wParam, lParam);
}

}

// Call back procedure from inside Encrypt()
bool _ProgressBarProc(PRBDATA *prbdata)
{
DataCryptMain *dcr = reinterpret_cast<datacryptmain>(prbdata->lpOtherData);
return dcr->ProgressBarProc(prbdata);
}


bool DataCryptMain::ProgressBarProc(PRBDATA *prbdata)
{
if (cryptthread.WaitToExit()) return TRUE;

PRBDATA *_prbdata = new PRBDATA;

memcpy(_prbdata, prbdata, sizeof(PRBDATA));

Notify_Progress_GUI(NOTIFY_PROGRESS_RUNNING, NULL, (LPARAM)_prbdata);

return FALSE;
}

// Rijndael processing
int DataCryptMain::CryptoRijnDaelProcess()
{
int iErrorOrInfo = OK;

RijnDaelCrypto *rdc = new RijnDaelCrypto;
	
...
...
	
// Set progress bar function
SetProgressFunc(_ProgressBarProc, (LPVOID)this);

------------------- Here this function loops through the file encryption
if (rdc->Encrypt(wcgFileNameIn, wcgFileNameOut, cryptParams.iCipherMode) < 0)
iErrorOrInfo = ERR_PROCESS_STOPPED_BY_USER;

_DELETE(rdc);

return iErrorOrInfo;
}

//WM_PROGRESS_RUNNING
bool DataCryptMain::OnProgressRunning(WPARAM wParam, LPARAM lParam)
{
	float fPercent[3];
	char sTemp[64];

	PRBDATA *prbdata = reinterpret_cast<prbdata>(lParam);

	// Percent % read file
	fPercent[0] = ((float)prbdata->iReadBytesIncByFuncRead / (float)prbdata->dwSize) * 100.0f;
	// Percent % block/s processed
	fPercent[1] = ((float)prbdata->iBlocksIncrement / (float)prbdata->iBlocksNum) * 100.0f;
	// Average percent
	fPercent[2] = (fPercent[0] + fPercent[1]) / 2;

	SendDlgItemMessage(hWnd, IDC_PROGRESSSTATUS, PBM_SETPOS, (WPARAM)fPercent[2], 0);

	// Display progress bar's percent value
	sprintf_s(sTemp, "%0.1f %%", fPercent[2]);
	SetDlgItemText(hWnd, IDC_PERCENT1, sTemp);

	// Display info
	sprintf_s(sTemp, "%d bytes", prbdata->dwSize);
	SetDlgItemText(hWnd, IDC_FILESIZE, sTemp);
	sprintf_s(sTemp, "%d bytes", prbdata->iReadBytesIncByFuncRead);
	SetDlgItemText(hWnd, IDC_READBYTES, sTemp);
	sprintf_s(sTemp, "%d block/s", (int)prbdata->iBlocksIncrement);
	SetDlgItemText(hWnd, IDC_BLOCKSPROCESSED, sTemp);

	_DELETE(prbdata);

	return FALSE;
} </prbdata></datacryptmain></datacryptmain>

Dennis L wrote:

About the first you'said, i didn't understand "you might find out what your GUI thread seems to be waiting for"

bool DataCryptMain::ProgressBarProc(PRBDATA *prbdata)
{
...
Notify_Progress_GUI(NOTIFY_PROGRESS_RUNNING, NULL, (LPARAM)_prbdata);
Sleep(1);
}