Prodave is Siemens PLC interface with high-level language programs, how to use it, here are a VB communication with Siemens PLC and write DB data examples
File list:
Sample_VB
........\AG_INFO_FRM.frm
........\BITTEST_FRM.frm
........\BST_DIAG_FRM.frm
........\BST_STAT_FRM.frm
........\DB_BUCH_FRM.frm
........\DB_READ_FRM.frm
........\DB_WRITE_FRM.frm
........\DIAG_BUF_FRM.frm
........\error.dat
........\error.eng
........\error.ger
........\FIELD_READ_FRM.frm
........\FIELD_WRITE_FRM.frm
........\LOAD_FRM.frm
........\MainForm.frm
........\MSSCCPRJ.SCC
........\Prodave6Test.bas
........\ProdaveTest_VB.exe
........\ProdaveTest_VB.vbp
........\ProdaveTest_VB.vbw
........\SETBIT_FRM.frm
........\UNLOAD_FRM.frm