Computer Programming Concepts and Visual Basic David I. Schneider

COLS and ROWS The Cols and Rows properties of a grid specify the numbers of rows and
columns.
COLWIDTH The statement MSFlexGrid1.Colwidth(m) = n specifies that column m of the
grid be n twips wide. (There are about 1440 twips in an inch.)
CONST The statement Const constantName = expression causes Visual Basic to treat every
occurrence of constantName as the value of the expression. This replacement takes place
before any lines of the program are executed. Unlike an assignment statement, Const does
not set up a location in the program’s memory for a variable. A constantName may appear in
only one Const statement and may not appear on the left side of an assignment statement. We
call constantName a “symbolic constant” or “named constant.”
CONTROL The Control data type may be used in the parameter lists of Sub and Function
definitions to allow the passing of control names to the procedure.
CONTROLBOX The ControlBox property determines whether or not a form has a Controlmenu
button displayed in the upper left corner. If the ControlBox property is set to True (the
default), the Control-menu button is displayed. Among the operations available from the
ControlBox menu is the ability to close the form and thereby end the program. If the ControlBox
property of a form is set to False, the Control-menu button is not displayed. Because,
in this case, the user cannot end the program by using the Control-menu button or by pressing
Alt+F4, it is important to provide a command button for this purpose.
CONNECT The Connect property of a data control identifies the format (such as Access,
FoxPro, Dbase) of the database determined by the DatabaseName property.
COS The value of the trigonometric function Cos(x) is the cosine of an angle of x radians.
[radians]
COUNT The value of collectionName.Count is the number of objects in the collection.
CREATEOBJECT If appName is the name of an application and objectType is the type or
class of the object to create, then the value of the function CreateObject(appName. object-
Type) is an OLE Automation object. For instance, CreateObject(“Excel.sheet”) creates an
Excel worksheet and CreateObject(“Word. Basic”) creates a Word document.
CSNG The function CSng converts byte, integer, long integer, and double-precision~ numbers
to single-precision numbers. If x is any number, the value of CSng(x) is the single-precision
number that x determines.
CSTR The function CStr converts byte, integer, long integer, single-precision, double-precision,
currency, and variant numbers to strings. If x is any number, the value of CStr(x) is the
string determined by x Unlike the Str function, CStr does not place a space in front of positive
numbers. [variant]
CURDIR The value of the function CurDir(drive) is a string specifying the current directory
on the drive specified by drive. The value of CurDir(“”) or CurDir is a string specifying
the current directory on the default drive. [directories]
CURRENCY The currency data type is extremely useful for calculations involving money.
A variable of type Currency requires 8 bytes of memory and can hold any number from
–922,337,203,685,477.5808 to 922,337,203,685,477.5807 with at most four decimal places.
Currency values and variables may be indicated by the type tag @: 21436587.01@, Balance@.
CURRENTX, CURRENTY The properties CurrentX and CurrentY give the horizontal and
vertical coordinates of the point on a form, picture box, or the printer at which the next Print
or graphics method will begin. Initially, CurrentX and CurrentY are the coordinates of the
upper-left corner of the object. [coordinate systems]
Appendix C 427