data fra tekstfelt

Hvad for en type program er det? (windows, win32api, mfc, vcl, ...)
Er text feltet en edit box eller ... ?
Hvordan er scrolbaren lavet?
Hvilken kompiler bruger du?
Kan vi se noget af koden?

Kode 

tekst = CreateWindow("EDIT", "20",
          WS_CHILD | WS_VISIBLE | WS_BORDER | SS_LEFT,
          95, 20, 40, 20,
          hwnd, (HMENU) 2,((LPCREATESTRUCT) lParam)->hInstance, NULL);

Kode 

Scroll = CreateWindow("scrollbar", NULL,
          WS_CHILD | WS_VISIBLE | SBS_HORZ,
          10, 60, 330, 20,
          hwnd, (HMENU) 3, ((LPCREATESTRUCT) lParam)->hInstance, NULL);
          
iPos = 20;
SetScrollRange(Scroll, SB_CTL, 20, 5000, TRUE);
SetScrollPos(Scroll, SB_CTL, iPos, TRUE);

Kode 

itoa(iPos, HZ, 10);
SetWindowText(tekst, HZ);
 
SetScrollPos(Scroll, SB_CTL, iPos, TRUE);

Kode 

char HZ[128];
GetWindowText(tekst, HZ, sizeof(HZ));
iPos = strtol(HZ, 0, 10);
SetScrollPos(Scroll, SB_CTL, iPos, TRUE);

Mit gæt ville være:

Kode 

char HZ[128];
GetWindowText(tekst, HZ, sizeof(HZ));
iPos = strtol(HZ, 0, 10);
SetScrollPos(Scroll, SB_CTL, iPos, TRUE);

Man kunne gøre det ved EN_CHANGE eller EN_UPDATE

Kode 

   case WM_COMMAND:
      switch(HIWORD(wParam))
      {
      case EN_CHANGE:
          // Kode Her
          break;  
      }
      break;

Noget i stil med:

Kode 

   case WM_COMMAND:
      switch(HIWORD(wParam))
      {
      case EN_CHANGE:
          // Kode Her
          break;  
      }
      break;

LOWORD(wParam) er ID'en på edit kontrollen, lParam er HWND for edit controllen.

Det tal du caster til en HMENU når du opretter kontrollerne er ID for kontrollen.

Kode 

   // Opret edit med id 3
   CreateWindow("EDIT", "20",
                         WS_CHILD|WS_VISIBLE|WS_BORDER|SS_LEFT,
                         95, 20, 40, 20,
                         hwnd, 
                         (HMENU)3,
                         Instance, 
                         0);
   // Opret edit med id 2
   CreateWindow("EDIT", "20",
                         WS_CHILD|WS_VISIBLE|WS_BORDER|SS_LEFT,
                         95, 20, 40, 20,
                         hwnd, 
                         (HMENU)2,
                         Instance, 
                         0);

   case WM_COMMAND:
      switch(HIWORD(wParam))
      {
      case EN_CHANGE:
          if(LOWORD(wParam) == 3)
          {
              // Kode for edit med id 3
              HWND ScrollBarForEdit3 = GetDlgItem(hwnd, 123);
          }
          else 
          {
               // kode for en anden id
              HWND ScrollBarForEdit2 = GetDlgItem(hwnd, 111);
          }
          break;  
      }
      break;

Kode 

   // Opret edit med id 3
   CreateWindow("EDIT", "20",
                         WS_CHILD|WS_VISIBLE|WS_BORDER|SS_LEFT,
                         95, 20, 40, 20,
                         hwnd, 
                         (HMENU)3,
                         Instance, 
                         0);
   // Opret edit med id 2
   CreateWindow("EDIT", "20",
                         WS_CHILD|WS_VISIBLE|WS_BORDER|SS_LEFT,
                         95, 20, 40, 20,
                         hwnd, 
                         (HMENU)2,
                         Instance, 
                         0);

   case WM_COMMAND:
      switch(HIWORD(wParam))
      {
      case EN_CHANGE:
          if(LOWORD(wParam) == 3)
          {
              // Kode for edit med id 3
              HWND ScrollBarForEdit3 = GetDlgItem(hwnd, 123);
          }
          else 
          {
               // kode for en anden id
              HWND ScrollBarForEdit2 = GetDlgItem(hwnd, 111);
          }
          break;  
      }
      break;

Kode 

case WM_HSCROLL:
switch(LOWORD(wParam))
{
            case SB_PAGEDOWN:
            iPos = min(5000, iPos + 10);
            break;

            case SB_LINEDOWN:
            iPos = min(5000, iPos + 1);
            break;

            case SB_PAGEUP:
            iPos = max(20, iPos - 10);
            break;

            case SB_LINEUP:
            iPos = max(20, iPos - 1);
            break;

            case SB_TOP:
            iPos = 0;
            break;

            case SB_BOTTOM:
            iPos = 5000;
            break;

            case SB_THUMBPOSITION:
            case SB_THUMBTRACK:
            iPos = HIWORD(wParam);
            break;

            default:
            break;
        }