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include vmd.inc VxDcall Int33_API |
The Int33_API service is called by WINOLDAPP to inform the special mouse driver the new state of mouse buttons and position for the application displayed in a window. If the special mouse driver is not installed, then this call returns with carry flag set. If the API is not provided, then also it returns with carry flag set.
EAX
Specifies the Client_AX register. The high word is always zero.
| Value | Meaning |
| 1 | Mouse API |
| Register | Description |
| Client_EBX | Specifies the handle of the virtual machine for which the call is made. |
| Client_ECX | Specifies (event flags, state) where state is the button state of the mouse and event flags convey the change in button state from previous call. |
| Client_EDI | Specifies (X,Y) position of mouse in pixels. |
| 2 | Special mouse API presence test. |
EBX
Specifies the handle of virtual machine making call.
The carry flag is clear if the API is supported. Otherwise, the carry flag is set to indicate the mouse driver is not special.
Flags