Windows GUI Specific Features › Presentation-Related Functions › Tips

Tips

Tips for the unsupported presentation-related functions are:

• All the Get and Set (for example, GetHeight, SetTop) functions use Windows API calls that need the HANDLE to a specific control or a window displayed on the desktop to get or set a presentation property of that window or control. These types of Windows API calls are not possible in a browser environment.
  • Dot notation cannot be used with Hypertext links the same as with HTMLText and HTMLControl, which were introduced in Advantage Gen 6.5.
  • The functions Beep and MessageBoxBeep emit a beeping sound on the speaker of the computer where the code is running. Since browsers normally run on a different computer than the Application Server, these features are not useful in browser clients. MessageBoxBeep, however, produces a message box from the browser window. Only the audio beep is not supported.
• The functions ClearDisplayProperties, RestoreDisplayProperties, and SaveDisplayProperties work with the registry entries of the specified window's display properties and use Windows APIs that need the handles of the registry keys. Any changes made to the registry keys only affect the display properties associated with windows on that machine. For browser clients, which normally reside on a different computer, these functions do not provide the desired effect.
• Additionally, some CA Gen Interface Object Methods and Properties are represented internally by Get or Set functions. Thus, they are not supported. The following CA Gen Interface Object Properties are not supported:
  • Caption
  • Enabled
  • Focus
  • FontSize
  • FontStyle
  • FontType
  • Groupbox Caption
  • Handle
  • Height
  • Left
  • Literal Value
  • Maximized
  • Minimized
  • Prompt
  • Prompt FontStyle
  • Prompt FontType
  • Prompt Height
  • Prompt Left
  • PromptFontSize
  • PromptTop
  • PromptWidth
  • Top
  • Visible
  • Width
• The following CA Gen Interface Object Methods are not supported:
  • Clear
  • Click
  • Copy
  • Cut
  • Paste
  • Redraw
  • SetBitmapBackground
  • SetSelection
  • Undo
  • Window.EnterableDropDownList
  • Window.EnterableDropDownLists
  • Window.EnterableListBox
  • Window.EnterableListBoxes
  • Window.OLEArea
  • Window.OLEAreas
  • Window.OLEControl
  • Window.OLEControls
  • OLE Functions