I need to make my form not resize to anything smaller than...

[Milk]

I removed that and it crashes...

You do have to be careful when sub classing

Did you remove

 'Keep the form only as wide as MAX_WIDTH
        If (r.RIGHT - r.Left > MAX_WIDTH) Then
            Select Case wParam
                Case WMSZ_LEFT, WMSZ_BOTTOMLEFT, WMSZ_TOPLEFT
                    r.Left = r.RIGHT - MAX_WIDTH
                Case WMSZ_RIGHT, WMSZ_BOTTOMRIGHT, WMSZ_TOPRIGHT
                    r.RIGHT = r.Left + MAX_WIDTH
            End Select
        End If
        
        'Keep the form only as tall as MAX_HEIGHT
        If (r.Bottom - r.Top > MAX_HEIGHT) Then
            Select Case wParam
                Case WMSZ_TOP, WMSZ_TOPLEFT, WMSZ_TOPRIGHT
                    r.Top = r.Bottom - MAX_HEIGHT
                Case WMSZ_BOTTOM, WMSZ_BOTTOMLEFT, WMSZ_BOTTOMRIGHT
                    r.Bottom = r.Top + MAX_HEIGHT
            End Select
        End If

because thats what I meant and it works for me.