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include vdd.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.
 
Parameter  Description
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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
 
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