Earlier versions of this were called "MaskoMania" but a lot has been cleaned up and additional functionality added.
Basically it is a UserControl to be hosted within a container control with a bitmap image. The user can "lasso" a rectangle to be cut or copied, dragged then pasted.
Masking is used to designate a transparent color. Minimalist demo:
![Name: sshot.png
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There is also another demo in the attachment. It covers a wider set of features available, like passing a snippet from one container to another or loading an external file as a snippet.
Basically it is a UserControl to be hosted within a container control with a bitmap image. The user can "lasso" a rectangle to be cut or copied, dragged then pasted.
Code:
'Mouse Actions:
'-------------
'
'When Enabled = True the mouse performs the following actions. When Enabled = False
'the events pass through with no processing.
'
'On the container:
'
' Left-click to clear the selection.
'
' Left-drag then release to establish the selection and copy or cut from the
' container's bitmap. See the Cutting property. A cut operation backfills with
' the MaskColor. A very small drag acts like a click.
'
' Shift-left-click makes Masking = False.
'
' Shift-right-click to choose the color under the mouse as MaskColor and make
' Masking = True.
'
'On the control:
'
' Left-drag to move the control.
'
' Shift-left-click makes Masking = False.
'
' Right-click pastes the contents of the control into the container bitmap.
'
' Shift-right-click to choose the color under the mouse as MaskColor and make
' Masking = True.There is also another demo in the attachment. It covers a wider set of features available, like passing a snippet from one container to another or loading an external file as a snippet.