I am looking into japheth Excel Automation sample. I have change some and at the same time coded the same in VB. Now I have VB and masm doing the same thing and I understand what masm is doing. Masm is working because of japheth's work. The problem arises when I want to do something else. For example when adding a new book japheth has following code.
This opens a new book. But how should I know that it is "scode" variant I should use and how do I know that it is just "DISP_E_PARAMNOTFOUND" among 15 other DISP_E_ equ to use.
And how do I find the right methods, propreties and so on among all 18000 rows in the excel.inc file. For example I have spent several hours to try to open an existing workbook. Still I haven't succeeded. The names in excel.inc are not equal to the names in VB object browser.
This is excel.inc for Add
STDMETHOD Add_ , :VARIANT,:SDWORD,:ptr ptr Workbook
This is excel.inc for Open
STDMETHOD Open , :BSTR,:VARIANT,:VARIANT,:VARIANT,:VARIANT,
:VARIANT,:VARIANT,:VARIANT,:VARIANT,:VARIANT,:VARIANT,:VARIANT,:VARIANT,
:SDWORD,:ptr ptr Workbook
What do I put in all these VARIANTs?
Can somebody tip me how I should approach the problem.
mov var1.vt,VT_ERROR
mov var1.scode,DISP_E_PARAMNOTFOUND
invoke vf(pWorkbooks,Workbooks,Add_),var1,0,addr pWorkbookThis opens a new book. But how should I know that it is "scode" variant I should use and how do I know that it is just "DISP_E_PARAMNOTFOUND" among 15 other DISP_E_ equ to use.
And how do I find the right methods, propreties and so on among all 18000 rows in the excel.inc file. For example I have spent several hours to try to open an existing workbook. Still I haven't succeeded. The names in excel.inc are not equal to the names in VB object browser.
This is excel.inc for Add
STDMETHOD Add_ , :VARIANT,:SDWORD,:ptr ptr Workbook
This is excel.inc for Open
STDMETHOD Open , :BSTR,:VARIANT,:VARIANT,:VARIANT,:VARIANT,
:VARIANT,:VARIANT,:VARIANT,:VARIANT,:VARIANT,:VARIANT,:VARIANT,:VARIANT,
:SDWORD,:ptr ptr Workbook
What do I put in all these VARIANTs?
Can somebody tip me how I should approach the problem.
This VB code open my workbook
But how on earth do I open it in masm. This is my latest attempt.
All variants are optional. It should do with one variant for all parameters. But how? Do someone know?
Set pWorkbook = pWorkbooks.Open("c:\projects\masm\projects_com\excel\bok1.xls")But how on earth do I open it in masm. This is my latest attempt.
.data
szWorkbook db "c:\projects\masm\projects_com\excel\bok1.xls",0
.code
mov var1.vt,VT_UINT
mov var1.uintVal,0
mov var2.vt,VT_BOOL
mov var2.boolVal,FALSE
mov var3.vt,VT_UINT
mov var3.uintVal,1
mov var4.vt,VT_BSTR
mov var4.bstrVal,0
mov var5.vt,VT_BOOL
mov var5.boolVal,TRUE
mov var6.vt,VT_DISPATCH
mov var6.pdispVal,xlWindows
mov var7.vt,VT_UNKNOWN
mov var7.punkVal,0
invoke MultiByteToWideChar,CP_ACP,0,addr szWorkbook,-1,addr lpWideCharStr,\
sizeof lpWideCharStr
invoke vf(pWorkbooks,Workbooks,Open),addr lpWideCharStr,var1,var2,var3,var4,\
var4,var5,var6,var7,var5,\
var5,var7,var2,\
0,addr pWorkbook
Excel.inc file:
;STDMETHOD Open , :BSTR,:VARIANT,:VARIANT,:VARIANT,:VARIANT,
; :VARIANT,:VARIANT,:VARIANT,:VARIANT,
; :VARIANT,:VARIANT,:VARIANT,:VARIANT,
; :SDWORD,:ptr ptr Workbook
VB object browser:
;Function Open(Filename As String, [UpdateLinks], [ReadOnly], [Format], [Password],
; [WriteResPassword], [IgnoreReadOnlyRecommended], [Origin], [Delimiter],
; [Editable],[Notify], [Converter], [AddToMru])
; As WorkbookAll variants are optional. It should do with one variant for all parameters. But how? Do someone know?
Hi minor28,
> All variants are optional. It should do with one variant for all parameters. But how? Do someone know?
Telling that a parameter is "not there" is done with:
> mov var1.vt,VT_ERROR
> mov var1.scode,DISP_E_PARAMNOTFOUND
as I've done it when calling the "Add" method. Thats described somewhere in ole automation docs.
BTW: there exists a COM forum for such questions. As I am concerned I tend to ignore the OOP forum a bit.
Japheth
> All variants are optional. It should do with one variant for all parameters. But how? Do someone know?
Telling that a parameter is "not there" is done with:
> mov var1.vt,VT_ERROR
> mov var1.scode,DISP_E_PARAMNOTFOUND
as I've done it when calling the "Add" method. Thats described somewhere in ole automation docs.
BTW: there exists a COM forum for such questions. As I am concerned I tend to ignore the OOP forum a bit.
Japheth
Thanks japheth,
I am sorry I started in wrong section. Future problems will be posted at COM section.
As a matter of fact the VT_ERROR variant was my first try. I have spent several of hours trying different combinations and none is working. This is the steps I am doing.
Alternative 1, the Add method is working but not Alternative 2, the Open method. I can't figure it out what's wrong. Any id?as?
I am sorry I started in wrong section. Future problems will be posted at COM section.
As a matter of fact the VT_ERROR variant was my first try. I have spent several of hours trying different combinations and none is working. This is the steps I am doing.
invoke GetAppPtr,pUnknown
mov pApp,eax
invoke vf(pApp,_Application,get_Workbooks),addr pWorkbooks
mov var1.vt,VT_ERROR
mov var1.scode,DISP_E_PARAMNOTFOUND
;Alternative 1: WORKING
invoke vf(pWorkbooks,Workbooks,Add_),var1,0,addr pWorkbook
;Alternative 2: NOT WORKING
.data
szWorkbook db "c:\projects\masm\excel\bok1.xls",0
.code
invoke MultiByteToWideChar,CP_ACP,0,addr szWorkbook,-1,addr lpWideCharStr,\
sizeof lpWideCharStr ;=>lpWideCharStr = c.:.\.p.r.o.j.e.c.t.s.\.m.a.s.m.\.e.x.c.e.l.\.b.o.k.1...x.l.s.
invoke vf(pWorkbooks,Workbooks,Open),addr lpWideCharStr,var1,var1,var1,var1,\
var1,var1,var1,var1,var1,var1,var1,var1,0,addr pWorkbook
;Error: if Filename = szWorkbook => E_OUTOFMEMORY (8007000C)
; if Filename = lpWideCharStr => STATUS_ACCESS_VIOLATION (C0000005)Alternative 1, the Add method is working but not Alternative 2, the Open method. I can't figure it out what's wrong. Any id?as?
Usually the automation objects want strings as BSTR, not just as "wide" strings. BSTRs are dynamically allocated with function SysAllocString, look for more details there.
Japheth
Japheth
Thanks japheth,
SysAllocString was the probleme. Now I can open my workbook.
SysAllocString was the probleme. Now I can open my workbook.