test if a value is in a table with vb code

[wimsan]

LS,

how can i use VB to test if a certain value is in table A or in table B ?
so how can i make this if statement work :

if (value) in table(A) then A = value
if value in table(B) then B = value

 

[Wayne Morgan]

Use DCount to see how many times the value is in the table. If 0, it's not
there. If 1 or greater, it is there.

If DCount("*", "[TableName]", "[FieldName]='" & Me.txtMyTextbox & "'") > 0
Then

You could also use DLookup. This might be faster since it "should" stop at
the first instance of the value and therefore not go through the entire
table.

If Not IsNull(DLookup("[FieldName]", "[TableName]", "[FieldName]='" &
Me.txtMyTextbox & "'")) Then