SysTools

C, WinAPI: Adjust ComboBox height

// PATCH: Windows 98 combobox fix (common controls version < 6)
// References and documentation links for this code:
// http://blogs.msdn.com/b/oldnewthing/archive/2006/03/10/548537.aspx
// ! http://vbnet.mvps.org/index.html?code/comboapi/comboheight.htm
void AdjustComboBoxHeight(HWND hWndCmbBox, DWORD MaxVisItems) {
RECT rc;
  GetWindowRect(hWndCmbBox, &rc);
  rc.right -= rc.left;
  ScreenToClient(GetParent(hWndCmbBox), (POINT *) &rc);
  rc.bottom = (MaxVisItems + 2) * SendMessage(hWndCmbBox, CB_GETITEMHEIGHT, 0, 0);
  MoveWindow(hWndCmbBox, rc.left, rc.top, rc.right, rc.bottom, TRUE);
}

2015.04.15