Thread: child window resizing problem

How can I get hwndChild1's height to auto-resize to the current window dimensions?

Code:

    ...

    RECT rect;
    int height;

    switch(message) {

        case WM_CREATE:

            GetClientRect(hwnd, &rect);
            height = rect.bottom;

            hwndChild1 = CreateWindowEx(
                WS_EX_STATICEDGE,
                "STATIC",
                "",
                WS_VISIBLE | WS_TABSTOP | WS_CHILD,
                0, 0, 200, height,
                hwnd,
                NULL,
                hInst,
                NULL);

            break;

        case WM_SIZE:

            / * i am assuming i need a SendMessage? */
            break;

    ...

WM_SIZE
fwSizeType = wParam; // resizing flag
nWidth = LOWORD(lParam); // width of client area
nHeight = HIWORD(lParam); // height of client area

You recieve this info and recalculate the child window size based on the proportions you decided earlier...

Then use

Code:

BOOL SetWindowPos(
  HWND hWnd,             // handle to window
  HWND hWndInsertAfter,  // placement-order handle
  int X,                 // horizontal position
  int Y,                 // vertical position
  int cx,                // width
  int cy,                // height
  UINT uFlags            // window-positioning flags
);

To resize that child window......

You can also use MoveWindow
eg.

Code:

MoveWindow(hwndChild1, NewLeft, NewTop, NewWidth, NewHeight,TRUE);

where NewLeft, NewTop, NewWidth and NewHeight are the new values for position/dimensions of your child window. The final param is TRUE if you want the control to be redrawn (so usually TRUE) or FALSE if you don't.