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Remarks |
The Windows ClipBoard provides support for the transfer
of various types of data between applications, or even different parts
of a single application. The
concept is simple -- save some data in the ClipBoard and retrieve it later.
But keep
in mind that the ClipBoard can only hold one data item at a time. When
it's overwritten by a new data item, the previous data is lost forever.
In many
cases, it's just used to transfer plain text. In
that case, you can just read and write a string to make the transfer.
The other
possible data types are listed below.
There are five general forms of the CLIPBOARD statement:
|
CLIPBOARD GET ITEM |
A data item is retrieved
from the CLIPBOARD, and assigned to the LONG
or DWORD variable specified by vItem. The
data item is assumed to be in the format specified by itemfmt.
See the
format definitions below. |
|
CLIPBOARD GET TEXT |
A text string is retrieved
from the CLIPBOARD, and assigned to the
string variable
specified by vText$. If no text
can be retrieved, a nul (zero-length) string is assigned instead. |
|
CLIPBOARD RESET |
The contents of the CLIPBOARD
are deleted. If
the operation is successful, the LONG or DWORD variable specified by vSuccess is assigned the value TRUE
(non-zero). If
it fails for any reason, the value FALSE
(0) is assigned instead. |
|
CLIPBOARD SET ITEM |
A new data item, specified
by hItem, is stored in the CLIPBOARD.
Any previous
contents are deleted. The data item is assumed to be in the format specified
by itemfmt. See
the format definitions below. If
the operation is successful, the LONG or DWORD variable specified by vSuccess is assigned the value TRUE
(non-zero). If
it fails for any reason, the value FALSE (0) is assigned instead. |
|
CLIPBOARD SET TEXT |
A new text string, specified
by StrExpr, is stored in the
CLIPBOARD. Any
previous contents are deleted. If the operation is successful, the LONG
or DWORD variable specified by vSuccess
is assigned the value TRUE (non-zero). If
it fails for any reason, the value FALSE (0) is assigned instead. |
The following equates
define the various CLIPBOARD formats, and are used as the itemfmt
parameter. All
of these equates are predefined in the PowerBASIC compiler.
|
%CF_BITMAP |
A handle to a bitmap (HBITMAP). |
|
%CF_DIB |
A memory object containing
a BITMAPINFO structure followed by the bitmap bits. |
|
%CF_DIF |
Software Arts' Data Interchange
Format. |
|
%CF_ENHMETAFILE |
A handle of an enhanced
metafile (HENHMETAFILE). |
|
%CF_HDROP |
A handle of type HDROP
that identifies a list of files. |
|
%CF_LOCALE |
The data is a handle to
the locale identifier associated with text in the clipboard. |
|
%CF_METAFILEPICT |
Handle of a metafile picture
format as defined by the METAFILEPICT structure. |
|
%CF_OEMTEXT |
Text format containing
characters in the OEM character set. Each line ends with a carriage return/linefeed
(CR-LF) combination. A null character signals the end of the data. |
|
%CF_PALETTE |
Handle of a color palette. |
|
%CF_PENDATA |
Data for the pen extensions
to the Microsoft Windows for Pen Computing. |
|
%CF_RIFF |
Represents audio data more
complex than can be represented in a CF_WAVE standard wave format. |
|
%CF_SYLK |
Microsoft Symbolic Link
(SYLK) format. |
|
%CF_TEXT |
Text format. Each line
ends with a carriage return/linefeed (CR-LF) combination. A
null character signals the end of the data. This
is the format used automatically by CLIPBOARD GET/SET TEXT. |
|
%CF_TIFF |
Tagged-image file format. |
|
%CF_UNICODETEXT |
Unicode text format. Each
line ends with a carriage return/linefeed (CR-LF) combination. A
null character signals the end of the data. |
|
%CF_WAVE |
Represents audio data in
one of the standard wave formats, such as 11 kHz or 22 kHz pulse code
modulation (PCM). |
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