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MSVBVM60.DLL API Calls

Much like kernel32.dll or user32.dll, MSVBVM60.DLL (or MSVBVM50 for VB5) contains a myriad of useful API function calls that you can utilise - although many of these are undocumented.
Just out of interest, I'd thought I'd post a few up here. Seeing as we all have to distribute that annoyingly chunky DLL with our apps, maybe we could start researching and put the thing to really good use!

Inputs
Usually two or more Variants

Returns
A Variant

API Declarations
''add two variants together
Declare Function vbaVarAdd Lib "MSVBVM60.DLL" Alias "__vbaVarAdd" (var1 As Variant, var2 As Variant) As Variant
''subtract two variants
Declare Function vbaVarSub Lib "MSVBVM60.DLL" Alias "__vbaVarSub" (var1 As Variant, var2 As Variant) As Variant
''multiply two variants
Declare Function vbaVarMul Lib "MSVBVM60.DLL" Alias "__vbaVarMul" (var1 As Variant, var2 As Variant) As Variant
''concatenate two varients
Declare Function vbaVarCat Lib "MSVBVM60.DLL" Alias "__vbaVarCat" (var1 As Variant, var2 As Variant) As Variant


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''you'll need to stick a command button on your form
Private Sub Command1_Click()
  ''See what these functions return...
  MsgBox "1+2=" & Trim$(Str$(vbaVarAdd(2, 1)))
  MsgBox "10-5=" & Trim$(Str$(vbaVarSub(5, 10)))
  MsgBox "6*6=" & Trim$(Str$(vbaVarMul(6, 6)))
  MsgBox CStr(vbaVarCat("lo!", "Hel"))
End Sub