There are 4 ways
to specify colors in VB:
1. Hexadecimal
numbers: It
represents a Hexadecimal value that corresponds directly to one of the 16
million possible colors that can be displayed on a color monitor. If the number
starts with &H00, then the remaining 6 Hexadecimal characters represent one
of 16 million colors. These colors can be displayed by varying the intensities
of Red, Green, or Blue. 2 Hex characters represent the intensities of Red,
Green and Blue, and their values range from 0 to 255 Decimal, or 0 to FF in
Hex.
An example will
make this easier to understand.For instance, the hex value &H000000FF& represents the color Red.
2. Color
Constants: Color
Constants are a subset of the much larger universe of Visual Basic Intrinsic
Constants. The idea behind the Visual Basic Intrinsic Constants is to give you
a name that you can remember in place of a hard to remember value.
Constant Value Description
vbBlack &H0 Black.
vbRed
&HFF Red
vbGreen &HFF00 Green
vbYellow &HFFFF Yellow
vbBlue
&HFF0000 Blue
vbMagenta &HFF00FF Magenta
vbCyan
&HFFFF00 Cyan
vbWhite &HFFFFFF White
3. The QBColor Function: The QBColor
function is a “holdover” from the original version of
Basic. The
QBColor expands on the eight colors provided by the Color constants and gives
you sixteen. The QBColor function req uires a single argument, which is a
number ranging from 0 to 15. The QBColor function returns a value that can then
be assigned to any of the color properties. For instance, this code returns a
value which when assigned to the BackColor property of the form changes it to
Green.
Form1.BackColor = QBColor(2)
4. The RGB
Function: The
RGB function , while not extremely user friendly, gives you the ability to
generate any valid color property value.
Here is the
syntax for this function: RGB(Red,Green,Blue)
As you can see,
the RGB function requires three arguments, with valid values for each being 0
to 255.
Form1.Backcolor
= RGB(255,0,0)
Form1.BackColor
= RGB(Red:=0, Green:=255, Blue:=0)
