Language Reference Guide : 4. System Classes : SubForm Class : ChildTopMargin Attribute
 
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ChildTopMargin Attribute
Data Type: integer
4GL Access: RW
The ChildTopMargin attribute specifies the margin on or below which all the subform's child fields usually will be placed, measured in 1000ths of an inch.
Settings
Location of Fields
Subform's ChildGravity setting other than FA_NONE
On or below the margin
Child fields with Gravity settings other than FA_NONE
On or below the margin
Child fields with Gravity setting=FA_NONE
On or below the margin unless both of the following are also true:
• The subform's ChildGravity=FA_NONE
• The YBottom or AbsYBottom attribute is changed at runtime