TE Edit Control .NET Core / .NET Framework Help
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TerSetParaIndent

Set the paragraph indentation. 

bool TerSetParaIndent( left, right, first, repaint)
int left;The left indentation in twips. Set this value to -1 to leave it unchanged
int right;The right indentation in twips. Set this value to -1 to leave it unchanged.
int first;The indentation adjustment (twips) to apply to the first line only. Set this value to -1 to leave it unchanged.
bool repaint;true to repaint the screen after this operation.

Return Value: The function returns true when successful.