Sets PDF417 row to column ratio to a fixed value. 
Sets the ratio between PDF417-rows and PDF417-columns. Does only work, if neither the value of PDF417-rows (BCSet_PDF417_Rows()) nor PDF417-columns (BCSet_PDF417_Columns()) are set to a constant value. If not set, the row:column ratio is chosen automatically by TBarCode (default). 
- See also:
- BCGet_PDF417_RowColRatio() 
- Parameters:
- 
  
    | [in] | pBarCode | Pointer to barcode structure. |  | [in] | szRatio | Ratio-string "rows:columns" in the form "3:5" (reset to default = null). |  
 
- Return values:
- 
  
    | ERRCODE | ErrOk (0) in case of success. Non-zero if error occurred. |