Elsewhere in the TipBank we show how you can display a custom popup menu on a TextBox control by subclassing the WM_CONTEXTMENU message that Windows sends the control when the user right-clicks on it. If you don’t like to resort to subclassing for such an easy job, you can use
The TextBox control supports the capability to undo changes, but there is no property or method that exposes this feature. You can achieve the same goal with a a set of messages. Private Declare Function SendMessage Lib “user32” Alias “SendMessageA” (ByVal _ hwnd As Long, ByVal wMsg As Long, ByVal
You can quickly determine how many lines of text are contained in a multiline TextBox control whose Scrollbars property is set to 3-Both – that is, when the TextBox behaves like a programmer’s editor – by counting the number of CR-LF characters in the Text property. You can do that
To determine the index of the first visible line in a multiline TextBox control you only need to send it the EM_GETFIRSTVISIBLELINE message: Private Declare Function SendMessage Lib “user32” Alias “SendMessageA” (ByVal _ hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, _ lParam As Any) As LongConst
If your video display has 256 colors or less and you assign a dithered color to the BackColor property of a TextBox control, you’ll find that the background color under the text inside the TextBox is displayed in a different (solid) color. To work around this issue, you must trap
By default, DreamWeaver 2 assumes that your page will be downloaded with a 28.8 KB per second modem. The estimated download time appears in the status bar. If you are creating an intranet site that runs over a local area network, you can assume that browsers are connecting much faster
Java lets you cast an integer into a byte and vice versa. While this provides power and flexibility, we should be aware that Java’s byte data type is signed, meaning that the leftmost bit (the 8th bit) of a byte is reserved for the sign of the data it holds
We can use java.text.DateFormat to validate dates. DateFormat is an abstract class for date/time formatting subclasses. It provides parsing methods for conversion of text into date. If the conversion cannot be carried out because of invalidity of the date, a java.text.ParseException is thrown. This is how we can know if
If we have a comma delimited string like “token0,token1,token2,,token4” that has some token(s) missing, and we try to use java.util.StringTokenizer to place each delimited token in a slot of an array A such that: A[0]=”token0″; A[1]=”token1″; A[2]=”token2″; A[3]=””; A[4]=”token4″; we might write code like: String s = “token0,token1,token2,,token4”; java.util.StringTokenizer stringTokenizer=