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 Returns the position on the y-axis that represents the height of a specified control or the last parked control 
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 Syntax: 
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 CHeight(control name, generation) 
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 Parameters: 
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 control name – The name of the control. If you specify an empty string (''), the last parked control will be used. 
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 generation – A number that represents the task's hierarchic position in the runtime task tree. 0 represents the current task, 1 its immediate ancestor, and so on. 
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 Returns: 
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 Position in units of measurement 
NOTE:  CHeight will always return the original position (at 100%) of the control irrespective of its scaled size. Since version: 4.6 
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 Note: 
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 Only parkable controls set the values for the function. A parkable control is a control with data or a control that may return an action. 
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 Exceptions: 
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 This function is not supported in Web Client tasks. 
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 Platform specific: 
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 This function is not supported for mobile devices. 
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 See also: 
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 The Online and Rich Client Samples projects (program IF01and RIF0) 
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