API Problem - ShowWindow - Visual Basic Discussion Boards

fuel2run23-May-04 21:51

23-May-04 21:51

hi there,

i'm having big trouble in reading a binary file that has some values in little-endian encoding and some other in big-endian encoding in the header.
can someone explain how to read the header retreaving those values?

thanks in advance.
fuel2run

Re: little-endian/big-endian

Dave Kreskowiak24-May-04 2:57

Dave Kreskowiak

24-May-04 2:57

fuel2run wrote:
a binary file that has some values in little-endian encoding and some other in big-endian encoding

WHAT?? Very strange...
But the fields that are encoded backwards would have to be read into a byte array and you'll have to write the code to reverse the byte order and then do some simple math to get the value back out.

byte0 | byte1 | byte2 | byte3

Gets reversed to:
byte3 | byte2 | byte1 | byte0

Do the math:
Value = (Byte3 << 24) + (Byte2 << 16) + (Byte1 << 8) + Byte0

Of course, this is subject to exactly how the bytes are really stores and what the value is supposed to be. You COULD have something like this if the values were stored WORD reversed instead of BYTE:

byte0 | byte1 | byte2 | byte3

Should be:
byte2 | byte3 | byte 0 | byte 1

It all depends on the system that wrote the file...

RageInTheMachine9532
"...a pungent, gastly, stinky piece of cheese!" -- The Roaming Gnome

Re: little-endian/big-endian

fuel2run24-May-04 4:31

fuel2run

24-May-04 4:31

thanks Dave,

i have to read some "int32" (in vb.net) and i know "where they are" , could you explain the simple math you wrote? i'm not familiar with that sintax (Byte3 << 24 ?)

a win system wrote the file,it is an esri shape file.

thank you
fuel2run

Re: little-endian/big-endian

Dave Kreskowiak24-May-04 4:51

Dave Kreskowiak

24-May-04 4:51

The << and >> operators are bit shift operators available in VB.NET 2003. They don't exist in 2002. All they do is shift a value a specificed number of bits in that direction. So if you, int a UInt32 had the value &HFF (decimal 255), it would look like this:

00000000|00000000|00000000|11111111

Shifting the value 24 bits to the left, it would now look like this:

11111111|00000000|00000000|00000000

And it's value would then be &HFF000000 (decimal 4,278,190,080).

You could accomplish the same shift by multiplying the value by 2^24.

RageInTheMachine9532
"...a pungent, gastly, stinky piece of cheese!" -- The Roaming Gnome

Re: little-endian/big-endian

fuel2run24-May-04 6:49

fuel2run

24-May-04 6:49

i'll try as soon as possible, you've been crystal clear

thank you!
fuel2run

Re: little-endian/big-endian

fuel2run1-Jun-04 21:57

fuel2run

1-Jun-04 21:57

it works fine Dave!

it's the very first time i read binary data.
many thanks!
fuel2run

Re: little-endian/big-endian

Dave Kreskowiak2-Jun-04 0:26

Dave Kreskowiak

2-Jun-04 0:26

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

API Problem - ShowWindow

ColonelSanders23-May-04 19:10

ColonelSanders

23-May-04 19:10

I am using:

Private Declare Function ShowWindow Lib "user32" Alias "ShowWindow" (ByVal hWnd As Long, ByVal nCmdShow As Long) As Long

In a VB.Net project (virtual desktops) to (try) and hide running programs (windows not created by my application). I have allready found the hWnd for the window I want to hide (invisable and not in task bar).

I can use the API above to hide the windows no problem (hWnd, SW_HIDE) but getting them back is... not working. I have tried to restore the window (same hWnd) on the next line of code, with SW_SHOW, SW_SHOWNORMAL, SW_RESTORE, SW_MAXIMIZE, SW_MAX (which I took straight form the VB6 API Text Viewer), all with no sucess. The process is still running (in TaskManager) so I doubt that the window was destroyed.

I tested the program on 2 PCs with different OSs (XP Pro and Longhorn 4074 - i know, i know: unstable alpha. But it should work on the XP system), so I think it is my fault.

If any one knows whats wrong, or has another way to hide and restore windows, I'd appriciate it.

Colonel Sanders

ScaleWidth/ScaleHeight Explantion

xfitr223-May-04 18:43

xfitr2

23-May-04 18:43

Could someone please explain the difference between scalewidth, scaleheight, scaleX, scaleY, etc. I am really confused. I am trying to set my controls and pictureboxes to automatically resize with the form, but I am having a lot of trouble. I would really like to see an explanation mathematically so that I understand it better. I see a lot of code that uses these with the screen.TwipsPerPixelX, screen.TwipsPerPixelY, but don't quite understand.
Confused | :confused:

Re: ScaleWidth/ScaleHeight Explantion

Dave Kreskowiak24-May-04 2:38

Dave Kreskowiak

24-May-04 2:38

ScaleX and ScaleY convert the values from one unit of measure (twips, pixels, whatever's....) to another.

ScaleWidth and ScaleHeight get/set the values that represent the width and height of the control/form in the units set by the ScaleMode property. Usually, you leave ScaleMode set to vbTwips.

You can use the TwipsPerPixelX and TwipsPerPixelY to determine what the increment should be for ScaleWidth and ScaleY. Say you want to increase the width of a button control by 2 pixels. You would get the TwipsPerPixelX value and multiply that by 2, then add that value to the value in Button1.ScaleWidth.

RageInTheMachine9532
"...a pungent, gastly, stinky piece of cheese!" -- The Roaming Gnome

a dll problem about vb.net

Anonymous23-May-04 0:10

Anonymous

23-May-04 0:10

I define a dll file inthe vb,net project
I want to set the dll file to server
,and the client forms connect and user the remote dll on the server

please help me ,thank you very much!

Re: a dll problem about vb.net

Dave Kreskowiak23-May-04 4:17

Dave Kreskowiak

23-May-04 4:17

You going to have to be more specific about the .DLL project. What kind of project did you create? What kind of server are you creating?

There is no way to just convert a .DLL into a server. Your project must be written AS a server from the very beginning...

RageInTheMachine9532
"...a pungent, gastly, stinky piece of cheese!" -- The Roaming Gnome

Office Com addin IDTExtensibility2

shinay22-May-04 22:35

shinay

22-May-04 22:35

I have take this sample program at microsoft.com
ms knowledgebase 238228 how to create office2000com addin in vb
and trying to create addin for office application. I am using the sample with
IDTExtensibility2. the problem is when using this sample i can't get the event to DocumentBeforeSave,DocumentBeforeClose some how
anyone has sovled this problem?

Shin

send information to external application

22-May-04 9:51

Could anybody help with the following!
I would like to send a string to another external application input field.

Re: send information to external application

Member 111855022-May-04 17:47

Member 1118550

22-May-04 17:47

Additional clarification.

External application could be any, example MS Word. The sequence of steps is the following.

1. click somewhere in external application input field
2. go back to your own application
3. send string and it goes to external application to the position where it was clicked.

Thak you for your help

Re: send information to external application

Charlie Williams22-May-04 18:46

Charlie Williams

22-May-04 18:46

Take a look at the SendKeys class. This example is straight out of the online help:

AppActivate("Untitled - Notepad")
SendKeys.SendWait("Hello world!")
' Send Ctrl S to open the Save As dialog box.
SendKeys.SendWait("^S")
' Send the name of the new file.
SendKeys.SendWait("c:\HelloWorld.txt")
' Send Alt S to save the file.
SendKeys.SendWait("%S")

Charlie

if(!curlies){ return; }

Re: send information to external application

Member 111855023-May-04 8:33

Member 1118550

23-May-04 8:33

It is not working in this case. External application is not activated within your program. There is no: AppActivate. It is external application, or process.

Re: send information to external application

Charlie Williams23-May-04 8:42

Charlie Williams

23-May-04 8:42

Are you using VB.NET?

Charlie

if(!curlies){ return; }

Re: send information to external application

Member 111855023-May-04 9:10

Member 1118550

23-May-04 9:10

yes, of course. I know I can use sendkeys.send in order to send sequence to the application which I've activated within my program. My, question how to send it to application which was started externally.

Re: send information to external application

Charlie Williams23-May-04 9:20

Charlie Williams

23-May-04 9:20

styr wrote:
There is no: AppActivate.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vblr7/html/vastmAppActivate.asp[^]

If it's not working for you, post some code so we can figure out where it's going wrong.

Charlie

if(!curlies){ return; }

Re: send information to external application [EDITED]

Dave Kreskowiak23-May-04 16:18

Dave Kreskowiak

23-May-04 16:18

You will probably have to import the Microsoft.VisualBasic namespace at the top of your code:

Imports Microsoft.VisualBasic

Also, you will find that this method has its problems. Your user CANNOT click anywhere on the user interface and another application must not open another windows (like in a login script) while the code for AppActiveate and SendKeys is running. Doing so will send the keystrokes to an unintended destination window and your control attempt will fail.

[EDIT]
Oops! Wrong recipient! Sorry! Blush | :O

RageInTheMachine9532
"...a pungent, gastly, stinky piece of cheese!" -- The Roaming Gnome

Re: send information to external application

Dave Kreskowiak23-May-04 16:32

Dave Kreskowiak

23-May-04 16:32

To use the AppActivate method, you will probably have to import the Microsoft.VisualBasic namespace at the top of your code:

Imports Microsoft.VisualBasic

Also, you will find that this method of control has its problems. Your user CANNOT click anywhere on the user interface and another application must not open another windows (like in a login script) while the code for AppActiveate and SendKeys is running. Doing so will send the keystrokes to an unintended destination window and your control attempt will fail.

RageInTheMachine9532
"...a pungent, gastly, stinky piece of cheese!" -- The Roaming Gnome

Re: compare Cells

Dave Kreskowiak24-May-04 2:48

Dave Kreskowiak

24-May-04 2:48

Unless there specific cells you wanted to compare, you would use a loop within a loop to compare a block of cells between two sheets. This example will compare the values between A1:J10:

Dim row, col As Integer
Dim cellID As String
 
For row = 1 to 10
    For col = 1 to 10
        cellID = Chr(64+row) & col.ToString("##")
        If sourceWorksheetObject.Range(cellID).Value <> _
           compareWorksheetObject.Range(cellID).Value Then
               ' Cells are not equal, do something about it...
        Else
               ' Cells ARE equal
        End If
    Next
Next

RageInTheMachine9532
"...a pungent, gastly, stinky piece of cheese!" -- The Roaming Gnome

Re: opening a file VB style

WBro22-May-04 2:05

WBro

22-May-04 2:05

ListView, Datagrid

Why invent the wheel, when you can invent software.

Re: opening a file VB style

Dave Kreskowiak22-May-04 3:19

Dave Kreskowiak

22-May-04 3:19

There are two ways to do this. If you want to use a DatGrid, you'll have to open the .XLS file using ADO.NET and the Excel data provider. You'll treat this just like a database. The other method involves adding a reference to either the Microsoft Excel Object Library or the Microsoft Office Object Library. You would then place this control on your form and manipulate it just like you would if you were using VBA inside Excel. You could tell your instance of Excel to load the file and display it, then the user would have all the functionality of Excel inside your app.

RageInTheMachine9532
"...a pungent, gastly, stinky piece of cheese!" -- The Roaming Gnome

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