Meta function automatically created by thinBasic engine and valid only inside Callback Functions.
In a Callback Function, return the window handle of the caller.
hWin = CBHNDL
hWin = Callback_Handle
When a user clicks on a button, types into a text box, or generally interacts with any in a dialog, Windows sends a %WM_COMMAND message to the control callback function. If no control callback function is defined, the message is sent to the dialog callback function. In either type of callback, CBHNDL returns the window handle of the parent dialog. CBHNDL will also return the window handle for all other types of messages that flow through dialog callback functions. For example, %WM_PAINT, %WM_INITDIALOG, etc.
As it is possible to share a control callback function with multiple controls, it is also possible to share a dialog callback function with multiple dialogs. In such cases, CBHNDL can be used to make a clear distinction between each dialog.
This function is only valid inside a Callback Function.