I want to have a window that has no title bar so you can't move it around. I've tried this but something is wrong because it disappears when using it:

void CMoveagainDlg::OnMouseMove(UINT nFlags, CPoint point)
{
if((nFlags & MK_LBUTTON) == MK_LBUTTON)
{
cpPos.x = point.x;
cpPos.y = point.y;

MoveWindow(cpPos.x,cpPos.y,0,0,TRUE);
}

CDialog::OnMouseMove(nFlags, point);
}

Do I have to handle a WM_LBUTTONDON message to? if so, for what!


<br>CocaCola
ICQ: 50302279
E-mail: nikado@pc.nu

: I want to have a window that has no title bar so you can't move it around. I've tried this but something is wrong because it disappears when using it:
:
: void CMoveagainDlg::OnMouseMove(UINT nFlags, CPoint point)
: {
: if((nFlags & MK_LBUTTON) == MK_LBUTTON)
: {
: cpPos.x = point.x;
: cpPos.y = point.y;
:
: MoveWindow(cpPos.x,cpPos.y,0,0,TRUE);
: }
:
: CDialog::OnMouseMove(nFlags, point);
: }
:
: Do I have to handle a WM_LBUTTONDON message to? if so, for what!

I wrote a little routine for that a long time ago...

  //------------------------------------------------------------------------------
  // HandleClientAreaDragMsg() - Eric Tetz 7/13/99
  //
  // If you pass WM_LBUTTONDOWN, WM_LBUTTONUP, and WM_MOUSEMOVE messages to this
  // function, it will enable "client area drag" for the window.
  //------------------------------------------------------------------------------
  static void HandleClientAreaDragMsg (HWND hwnd, UINT msg, int mouseX, int mouseY)
  {
    static int captureX = 0;
    static int captureY = 0;

    switch (msg)
    {
    case WM_LBUTTONDOWN:
      captureX = mouseX;
      captureY = mouseY;
      SetCapture (hwnd);
      break;

    case WM_LBUTTONUP:
      ReleaseCapture();
      break;

    case WM_MOUSEMOVE:
      if (GetCapture() == hwnd)
      {
        RECT rc;
        GetWindowRect (hwnd, &rc);
        int  newX   = rc.left + mouseX - captureX;
        int  newY   = rc.top  + mouseY - captureY;
        int  width  = rc.right - rc.left;
        int  height = rc.bottom - rc.top;
        UINT flags  = SWP_NOZORDER | SWP_NOACTIVATE;
        SetWindowPos (hwnd, NULL, newX, newY, width, height, flags);
      }
      break;
    }
  }

It's written using the raw API, but you can easily use it in your MFC app like this:

  void CMoveagainDlg::OnLButtonDown(UINT nFlags, CPoint point) 
  {
    HandleClientAreaDrag(m_hWnd, WM_LBUTTONDOWN, point.x, point.y);
    CDialog::OnLButtonDown(nFlags, point);
  }

  void CMoveagainDlg::OnLButtonUp(UINT nFlags, CPoint point) 
  {
    HandleClientAreaDrag(m_hWnd, WM_LBUTTONUP, point.x, point.y);
    CDialog::OnLButtonUp(nFlags, point);
  }

  void CMoveagainDlg::OnMouseMove(UINT nFlags, CPoint point) 
  {
    HandleClientAreaDrag(m_hWnd, WM_MOUSEMOVE, point.x, point.y);
    CDialog::OnMouseMove(nFlags, point);
  }

Cheers,
Eric

If you just want to move the window using the mouse, this is all you have to do:
if(msg==WM_LBUTTONDOWN) {
DefWindowProc(hWnd,SC_SYSCOMMAND,SC_MOVE+1,lparam);
}

Using MFC, it would be something like this...
void CMoveagainDlg::OnLButtonDown(UINT nFlags, CPoint point)
{
DefWindowProc(m_hWnd, SC_SYSCOMMAND, SC_MOVE+1,MAKELPARAM(point.x,point.y));
}

: If you just want to move the window using the mouse, this is all you have to do:
: if(msg==WM_LBUTTONDOWN) {
: DefWindowProc(hWnd,SC_SYSCOMMAND,SC_MOVE+1,lparam);
: }
:
: Using MFC, it would be something like this...
: void CMoveagainDlg::OnLButtonDown(UINT nFlags, CPoint point)
: {
: DefWindowProc(m_hWnd, SC_SYSCOMMAND, SC_MOVE+1,MAKELPARAM(point.x,point.y));
: }

Ahhh!! Cool! Much easier than my method. For CocaCola's sake, I should point out a typo: it's WM_SYSCOMMAND, not SC_SYSCOMMAND.

Anyway, I can still see a situation where my approach would be useful... ;) Newer version of Windows have a "show window contents while dragging" option. If you want your window to show it's contents while dragging regardless of the Windows version and/or the setting of that option, you can use my EnableClientAreaDrag routine.

This can be really helpful if you have non-rectangular window. It looks cheesy if you have a window shaped like a pear, but when you drag it you see a rectangle - it kinda spoils the illusion.

Cheers,
Eric

: : If you just want to move the window using the mouse, this is all you have to do:
: : if(msg==WM_LBUTTONDOWN) {
: : DefWindowProc(hWnd,SC_SYSCOMMAND,SC_MOVE+1,lparam);
: : }
: :
: : Using MFC, it would be something like this...
: : void CMoveagainDlg::OnLButtonDown(UINT nFlags, CPoint point)
: : {
: : DefWindowProc(m_hWnd, SC_SYSCOMMAND, SC_MOVE+1,MAKELPARAM(point.x,point.y));
: : }
:
: Ahhh!! Cool! Much easier than my method. For CocaCola's sake, I should point out a typo: it's WM_SYSCOMMAND, not SC_SYSCOMMAND.
:
: Anyway, I can still see a situation where my approach would be useful... ;) Newer version of Windows have a "show window contents while dragging" option. If you want your window to show it's contents while dragging regardless of the Windows version and/or the setting of that option, you can use my EnableClientAreaDrag routine.
:
: This can be really helpful if you have non-rectangular window. It looks cheesy if you have a window shaped like a pear, but when you drag it you see a rectangle - it kinda spoils the illusion.
:
: Cheers,
: Eric
:
:
Right.
I gotta stop typing these things at 1AM... =)