Right-clicking on a node in a treeview does not change the SelectedNode property, therefore it is impossible to get a handle on the current node within, for example, a context menu when using this method.
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The following function can be used to resize images on your machine. Note that this function works out the image format internally and creates a file of the same format. You may want to adjust this to output a file of a different format.
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To execute a stored procedure on your database server with JDBC, you need to prepare a CallableStatement using your active connection. Input and output parameters but be explicitly declared.
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