C / C++ / MFC

CString GetLine(CString sFileName, int nLineNumber)
{  
  CStdioFile Inputfile;
  CString sLine = _T("");
  CFileException FileExc;
  UINT nOpenFlags = CFile::modeRead;

  //OPen the file & load it into a CStdioFile object	
	if (!Inputfile.Open(sFileName, nOpenFlags, &FileExc)) {
		FileExc.ReportError();
		return "Error";
	}

	//Reading line by line
	while(Inputfile.ReadString(sLine) && nCount < nLineNumber){
		nCount++;
	}
	Inputfile.Close();
return sLine;
}

case WM_PAINT:
    {
        HDC hdc;
        PAINTSTRUCT ps;
        hdc = BeginPaint( hWnd, &ps );

        InvalidateRect(hWnd, NULL, TRUE);
        UpdateWindow(hWnd);

        EndPaint( hWnd, &ps );

    }
    return 0;
    break;

//RedrawWindow(hWnd, NULL, NULL,RDW_UPDATENOW|RDW_ALLCHILDREN);

Sarriss wrote:

but even without the WM_PAINT and using the updatewindow etc it still causes overlapping and no redrawing

Mark Salsbery
Microsoft MVP - Visual C++

Sarriss wrote:

im still trying to get it so when i bring it as the focus window it redraws and doesnt leave half of the window with the image of the window that was infront of it

case WM_PAINT:
   {
      HDC hdc;
      PAINTSTRUCT ps;
      hdc = BeginPaint( hWnd, &ps );

      // draw on the HDC here!

      EndPaint( hWnd, &ps );
   }
   return 0;
   break;

Mark Salsbery
Microsoft MVP - Visual C++

Sarriss wrote:

said the hbrBackground Brush IS NOT NULL as in it has a value

Sarriss wrote:

its just when i made these child forms they dont do it anymore.

Mark Salsbery
Microsoft MVP - Visual C++

void RegWnd::RegChildWindow(HINSTANCE hInstance, char *ClassName, WNDPROC WndProc, LPCTSTR MenuName)
{

	wcc.cbSize = sizeof(WNDCLASSEX);
	wcc.style = CS_VREDRAW|CS_HREDRAW|CS_DBLCLKS;
	wcc.lpfnWndProc = WndProc;
	wcc.cbClsExtra = 0;
	wcc.cbWndExtra = 0;
	wcc.hInstance = hInstance;
	wcc.hIcon =  static_cast<hicon>(LoadImage(  hInstance,
                                              MAKEINTRESOURCE(IDI_MAIN),
                                              IMAGE_ICON,
                                              255,
                                              255,
                                              LR_DEFAULTCOLOR));
	wcc.hCursor = LoadCursor(NULL, IDC_ARROW);
	wcc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
	wcc.lpszMenuName = MenuName;
	wcc.lpszClassName = ClassName;
	wcc.hIconSm =  static_cast<hicon>(LoadImage(  hInstance,
                                              MAKEINTRESOURCE(IDI_MAIN),
                                              IMAGE_ICON,
                                              16,
                                              16,
                                              LR_DEFAULTCOLOR));

}</hicon></hicon>

HWND CreateChild(HINSTANCE hInstance,
				LPCTSTR ClassName,
				LPCTSTR WndName,
				HWND parent,
				DWORD dStyle	= WS_OVERLAPPEDWINDOW|WS_CHILD,
				DWORD dXStyle	= 0L,
				int xPos		= CW_USEDEFAULT,
				int yPos		= CW_USEDEFAULT,
				int Width		= 400,
				int height		= 400);