ShellExecute nao abre excel

[Sistem]

Tentei assim:
cArqExcel:="c:\temp\test.xls"

ShellExecute( 0, "open", cArqExcel ) // nao abre
ShellExecute(GetActiveWindow(), "open", "excel", cArqExcel,"",5) // nao abre
ShellExecute(0, "OPEN", cArqExcel, "", "", 0) // nao abre
WinExec("Excel "+cArqExcel,0) // nao abre
WAITRUN( "EXCEL " +cArqExcel, 1) // nao abre

usando Win7 x64 Office 2010
FWH1302 - xHarbour

alguem tem uma ideia?

obrigado

[Antonio Linares]

Revisa FWH/samples/excel.prg y excel2.prg por si te sirve de ayuda

[Sistem]

tentei o seguinte:
cArqExcel:="c:\temp\test.xls"
oExcel := CreateObject("Excel.Application")
oPlani := oExcel:WorkBooks:Open( cArqExcel, OleDefaultArg() , OleDefaultArg() , OleDefaultArg() ) / nao abre

e

cArqExcel:="c:\temp\test.xls"
oExcel := CreateObject("Excel.Application")
oPlani := oExcel:WorkBooks
oPlani :Open( cArqExcel ) // nao abre

fica no gerenciador de tarefas mais nao abre



opss!!
oExcel:Visible = .T.

hWnd:=oExcel:hWnd
ShowWindow(hWnd, 3) //SW_MAXIMIZE=3 SW_NORMAL=1 SW_MINIMIZE=6
BringWindowToTop(hWnd)