include minivdd.inc
VxDcall VDD_Msg_ClrScrn
The VDD_Msg_ClrScrn service initializes the screen for messages displayed when in message mode. If the focus virtual machine is the current virtual machine, this service clears the screen immediately. Otherwise, it initializes the screen when the focus changes.
The virtual shell device uses this service.
Parameters
EBX | Specifies the virtual machine handle. |
EAX | Specifies the background attribute. |
Return Value
The EAX register contains the width in columns.
The EDX register contains the height in rows.
Comments
A virtual device that uses this service must issue a Begin_Message_Mode control message before calling this service.
Uses
Flags, EAX, EDX