mmioInstallIOProc
The mmioInstallIOProc
function installs or removes a custom I/O procedure. This function also locates
an installed I/O procedure, using its corresponding four-character code.
LPMMIOPROC mmioInstallIOProc(
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FOURCC fccIOProc, |
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LPMMIOPROC
pIOProc, |
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DWORD dwFlags |
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); |
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Parameters
fccIOProc
Four-character
code identifying the I/O procedure to install, remove, or locate. All
characters in this code should be uppercase.
pIOProc
Address of
the I/O procedure to install. To remove or locate an I/O procedure, set this
parameter to NULL. For more information about the I/O procedure, see MMIOProc.
dwFlags
Flag
indicating whether the I/O procedure is being installed, removed, or located.
The following values are defined:
MMIO_FINDPROC
Searches for
the specified I/O procedure.
MMIO_GLOBALPROC
This flag is
a modifier to the MMIO_INSTALLPROC flag and indicates the I/O procedure should
be installed for global use. This flag is ignored if MMIO_FINDPROC or
MMIO_REMOVEPROC is specified.
MMIO_INSTALLPROC
Installs the
specified I/O procedure.
MMIO_REMOVEPROC
Removes the
specified I/O procedure.
Return Values
Returns the
address of the I/O procedure installed, removed, or located. Returns NULL if
there is an error.
See Also