function downloads the information in the specified buffer to the opened
phone device at the selected data ID.
| HPHONE hPhone,
| DWORD dwDataID,
| LPVOID const lpData,
| DWORD dwSize
A handle to the open phone device. The application must be the owner of the
Where in the phone device the buffer is to be downloaded.
A pointer to the memory location where the data is to be downloaded from.
The size of the buffer in bytes.
Returns a positive request ID if the function will be completed asynchronously
or a negative error number if an error has occurred. The dwParam2
parameter of the corresponding PHONE_REPLY
message is zero if the function is successful or it is a negative error
number if an error has occurred. Possible return values are:
PHONEERR_INVALPHONEHANDLE, PHONEERR_OPERATIONUNAVAIL, PHONEERR_NOTOWNER,
PHONEERR_NOMEM, PHONEERR_INVALDATAID, PHONEERR_RESOURCEUNAVAIL,
PHONEERR_INVALPHONESTATE, PHONEERR_OPERATIONFAILED, PHONEERR_INVALPOINTER, PHONEERR_UNINITIALIZED.
function downloads a maximum of dwSize
bytes from lpData
to the phone device. The format of the data, its meaning to the phone device,
and the meaning of the data ID are service-provider specific. The data in the
buffer or the selection of a data ID may act as commands to the phone device.
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