I am using SDK so CPaintDC is ruled out. So I have to add BeginPaint() and EndPaint() instead fro it to work.

Thanks. But I foound out what was missing from my code. I had to add PAINTSTRUCT ps; HDC hdc = ::BeginPaint(m_hWnd, &ps); at the start and ::EndPaint(m_hWnd, &ps); at end of my code snippet and it works. :)

I have a property page with a static control area defined as CONTROL "",IDC_TEMP_GRPH,"Static",SS_GRAYFRAME,154,44,135,129 I am handling WM_PAINT message and the following piece of code gets executed: CDC* pDC = new CDC(GetDC(this->m_hWnd)); HWND hStatic = GetDlgItem(m_hWnd,IDC_TEMP_GRPH); RECT pirect; GetClientRect(hStatic,&pirect); COLORREF bkColor; bkColor = RGB(225,0,0); HBRUSH hBrush = ::CreateSolidBrush(bkColor); ::FillRect(GetDC(hStatic),&pirect,hBrush); The problem is I am not able to see this solid color block. It appears blinking while I drag the Property Sheet but disappears when I switch to next page and switch back to that page. Can anyone please tell me what is missing here?

I am working on a Win32 based GUI, which has a menu with a static area defined as CONTROL "",IDC_GRAPH,"Static",SS_GRAYFRAME,17,119,264,54 in the rc file. In my OnPaint(), the following code gets executed HWND hStatic = GetDlgItem(m_hWnd,IDC_GRAPH); //m_hWnd is CWnd handle RECT pRect; HDC hStaticDC= GetDC(hStatic ); GetClientRect(hStatic,&pRect); iCX = (pRect->right - pRect->left)/2; iCY = (pRect->bottom - pRect->top)/2; COLORREF bkColor = GetBkColor(hStaticDC); HPEN pen = CreatePen(PS_SOLID,8,bkColor); MoveToEx(hStaticDC,iCX+4,iCY,NULL); LineTo(hStaticDC,iCX1+4,iCY); The code compiles correctly. But the bkColor gets CLR_INVALID and MoveToEx and LineTo returns a zero value. Where have I gone wrong?

modified on Thursday, December 11, 2008 4:20 AM

Posting this again ..... please help ********************************************** I have created Property Sheet and Pages using Win32 SDK. Now I need to modify a edit box on a Page. The piece of code is HWND hPropSheet = GetActiveWindow(); HWND hPropPage0=PropSheet_GetCurrentPageHwnd(hPropSheet ); SetDlgItemText(hPropPage0,IDC_EDIT1,(LPCWSTR)szBuffer); Is this correct? I am not able to get the Handle to window to the Property Sheet ..... Please help

Thanks :)

I have a Property Sheet and I need to disable the close button, the red "X" button that appears on the right top of the sheet. What is the procedure for disabling it?

Oops my bad. its HWND hPropPage0=PropSheet_GetCurrentPageHwnd(hPropSheet ); Sorry for the confusion. :doh:

I have created Property Sheet and Pages using Win32 SDK. Now I need to modify a edit box on a Page. The piece of code is HWND hPropSheet = GetActiveWindow(); HWND hPropPage0=PropSheet_GetCurrentPageHwnd(hDlg); SetDlgItemText(hPropPage0,IDC_EDIT1,(LPCWSTR)szBuffer); Is this correct? I am not able to get the Handle to window to the Property Sheet ..... Please help :confused:

Can I use InvalidateRect() in place of CWnd::Invalidate().

I am having trouble with gethostname(). The code compiles correctly but the function returns an unknown error. I have compiled on VC6 and .Net2005 platforms. While in VC6, the buffer remains empty, in .Net2005, it gives me unknown error. Why does this occur? char myname[256]; memset((void*)myname,0,sizeof(myname); if(!gethostname(myname, sizeof(myname))) { int _temp = WSAGetLastError(); if(_temp == WSAEFAULT) MessageBox(NULL,"Socket creation failed; Attempt to get host name failed; WSAEFAULT ","Lamia",MB_OK);/* who are we? */ if(_temp == WSANOTINITIALISED) MessageBox(NULL,"Socket creation failed; Attempt to get host name failed; WSANOTINITIALISED ","Lamia",MB_OK); if(_temp == WSAENETDOWN) MessageBox(NULL,"Socket creation failed; Attempt to get host name failed; WSAENETDOWN ","Lamia",MB_OK); if(_temp == WSAEINPROGRESS) MessageBox(NULL,"Socket creation failed; Attempt to get host name failed; WSAEINPROGRESS ","Lamia",MB_OK); else MessageBox(NULL,"Socket creation failed; Attempt to get host name failed; error unknown","Lamia",MB_OK); }

I will have to look into the manual carefull now. Anyway thanks for the help. :)

I do have some manuals but they do not say much. This USB port is an auxillary port of the controller. Normally it is not used. But I do know the USB drivers. Could you please tell me the procedure to get the driver handle? Is there any article I can refer to?

Hi, I am working on a hardware controller device which has a USB port I need to use to write commands to the controller. I have been able to ennumerate the device and obtain the handle for that device using CreateFile(). But when I try to execute ReadFile() or WriteFile(), the function fails and GetLastError() returns ERROR_INVALID_FUNCTION. My code looks like this: HANDLE hUsbDevice = CreateFile(path.c_str(),GENERIC_READ|GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL); if (hUsbDevice == INVALID_HANDLE_VALUE) { val = GetLastError(); cout<<"failed in CreateFile"<<" error: "<<val<<"\n" ; } else { char _send_buff[] = {'I','n','i','t','1','=','0','\0'}; int _send_size = sizeof(_send_buff); int _wrstatus = 0; DWORD _bytes_written = 0; _wrstatus = WriteFile(hUsbDevice,_buff,_size,&_bytes_written,NULL); if (!_wrstatus) cout<<"\nError while writing port: "<<GetLastError()<<endl; } Where am I going wrong here :confused:

I have written a program that enumetares a USB devices connected to a PC and obtains all the interface strings. I am using SetupDI APIs I compile the program on PC1 and everything works fine. When I copy the executable of my program [along with all files in release dir] to a different PC, say PC2 and execute it, the program does not return any USB interface strings. But when I compile my program on the PC2 and run it, I get all the USB interface strings Why does this happen? The configurations of both the PCs are same.

Thanks Judy. I will try this

I used the path but made a mistake while copying the code here. Ok so maybe I will try using WMI. Do you have any tutorial which explains how to use Windows API in such situatuons?

I tried the method you suggested. I did not work. The code snippet is std::string path = Devices[0] + "\\context.cfg"; HANDLE hUsbDevice = CreateFile(Devices[0].c_str(), GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL); if (hUsbDevice == INVALID_HANDLE_VALUE) return 1; char data[MAX_PATH]; DWORD nNumberOfBytesToRead = MAX_PATH; DWORD lpNumberOfBytesRead = 0; if(!ReadFile(hUsbDevice,(void*)data, nNumberOfBytesToRead, &lpNumberOfBytesRead,NULL)) { int err = GetLastError(); return 0; } GetLastError() returns ERROR_INVALID_PARAMETER

Havent tried that. Will check it out

I enumarate the USB device first and get the interface using SetupDiGetDeviceInterfaceDetail(). The name is stored in a vector Devices. Then I use the following call: HANDLE hUsbDevice = CreateFile(Devices[0].c_str(), GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);