Modified
drag operations.
An application can define its own modified drag operations for use when
simulating a drop. These operations must have a value greater than DO_UNKNOWN.
Possible values are described in the following list:
DO_DEFAULT
Execute the default drag operation.
No modifier keys are pressed.
DO_COPY
Execute a copy operation. The Ctrl
key is pressed.
DO_LINK
Execute a link operation. The Ctrl+Shift
keys are pressed.
DO_MOVE
Execute a move operation. The Shift
key is pressed.
DO_CREATE
Execute a create operation. (A
template is being dropped.)
DO_NEW
Execute a create another operation.
This value should be defined as DO_UNKNOWN+3 if it is not recognized in
the current level of the toolkit.
DO_UNKNOWN
An undefined combination of modifier
keys is pressed.
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