StringGrid
Add a TStringGrid object to a form to present textual data in a tabular format. TStringGrid provides many properties to control the appearance of the grid, as well as events and methods that take advantage of the tabular organization of the grid in responding to user actions.
TStringGrid introduces the ability to associate an object with each string in the grid. These objects can encapsulate any information or behavior represented by the strings that are presented to the user.
If the strings to be presented in a grid represent field values from the records in a dataset, use TDBGrid instead.
Edit Box
An edit box is a Windows control used to get or display text for the user's interaction. At its most regular use, an edit box serves as a place to fill out and provide information. Such a use is common on employment applications, login dialog boxes, etc.
Like most other controls, the role of an edit box is not obvious at first glance; that is why it should be accompanied by a label that defines its purpose. From the user's standpoint, an edit box is named after the label closest to it. Such a label is usually positioned to the left or the top side of the edit box. From the programmer's point of view, an edit box is a placeholder used for various things. For example, you can show or hide it as you see fit. You can also use it only to display text without allowing the user to change it.
To
add a label to a container, click the Edit button
from
the Standard section of the Tool Palette
and click on the object that would host it.
The contents of an edit box can be empty or contain some text. If you want it empty, use the Clear() method. This would delete the whole contents of the control:
Editl->Clear();
TTimer
TTimer is used to simplify calling the Windows API timer functions SetTimer and KillTimer, and to simplify processing the WM_TIMER messages. Use one timer component for each timer in the application.
The execution of the timer occurs through its OnTimer event. TTimer has an Interval property that determines how often the timer’s OnTimer event occurs. Interval corresponds to the parameter for the Windows API SetTimer function.
Image
Use TImage to display a graphical image on a form. Use the TPicture object in the Picture property to specify the actual bitmap, icon, metafile, or other graphic object displayed by TImage. Properties and methods of TPicture can be used for such things as loading an image from file, clearing the image in the TImage, and assigning an image for another control. TImage introduces several properties to determine how the image is displayed within the boundaries of the TImage object.
To add an image to a form or data module so that it is available for display by other controls, such as action lists and bitmap buttons, use a TImageList control instead.