First pass conversion of NAV Patterns

content/NAVPatterns/findset-findfirst-findlast/index.md

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+title = "findset-findfirst-findlast.md"
+weight = 600
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+FINDSET, FIND('+') or FIND('-') should only be used when NEXT is used and vice versa.
+
+Bad code
+
+    IF Cust.FIND('-') THEN
+    ERROR(CustIsBlockErr)
+
+Good code
+
+    IF Cust.FINDFIRST THEN
+    ERROR(CustIsBlockErr)
+
+Bad code
+
+    IF Cust.FINDFIRST THEN
+    REPEAT
+    ...
+    UNTIL Cust.NEXT = 0;
+
+Good code
+
+    IF Cust.FINDSET THEN
+    REPEAT
+    ...
+    UNTIL Cust.NEXT = 0;