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i send variable by this fuction
dim ss as string = textbox1.text // here imagen i put "2415666:"
/// here code whcih minimaze the form of vb.net
System.Windows.Forms.SendKeys.SendWait("ss")// here the code which different and change . and after many click of button which make this action the string will print as "245566654" or some thing wrong .. the question why the variable printed like this ....
///here code whcih minimaze the form of vb.net
kilany
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Mr kilany wrote: System.Windows.Forms.SendKeys.SendWait("ss")//
You didn't sned the contents of your ss variable. You sent the string "ss" to the other app (without the quotes).
The line should look like this:
SendKeys.SendWait(ss) ' no quotes!!
Dave Kreskowiak
Microsoft MVP - Visual Basic
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hi,
i want to show a combobox in datagrid at runtime.
sppose if user in 5 colum he press the f9 key then currentcell is show a combobox
pls give code it helpfull to me
thanks
vipin paliwal
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Hi
I want to work with data in an excel worksheet in my vb6 program, but I don't know what to do...
Could anyone introduce me a tutorial?
Thanks
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What do you mean by working with Excel from vb6? Do you just want to display only data on the form or display it in any control and you could edit its data? But first, try to check from google search result.[^]
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Sorry for not being so clear...
I mean editing (readin/writing) data in excel sheets...
Thanks
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Thanks... I found what I needed
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can any one tell me how to connect combobox with datagrid in VB.NET
PLZ MAIL ME AT toneeraj.kumar@yahoo.com
neeraj kumar
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<asp:datagrid id="dataGrid1" HorizontalAlign="Center" BorderColor="#CCCCCC" Runat="server" Width="792px" OnItemDataBound="dataGrid1_ItemDataBound" AllowSorting="True" AutoGenerateColumns="False" OnSortCommand="dataGrid1_SortCommand" Height="224px">
<Columns>
<asp:TemplateColumn>
<HeaderStyle Font-Bold="True" HorizontalAlign="Left"></HeaderStyle>
<ItemStyle HorizontalAlign="Left"></ItemStyle>
<HeaderTemplate>
first column
</HeaderTemplate>
<ItemTemplate>
<asp:DropDownList ID="dd" Runat="server" OnSelectedIndexChanged="dataGrid1_SelectedIndexChanged" AutoPostBack="True"></asp:DropDownList>
</ItemTemplate>
</asp:TemplateColumn>
</column>
</asp:datagrid>
add the above code in html in between form opening closing tag
Shipra Pandey
Software Developer
Solversa Technology Pvt Ltd.
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Hello everyone,
I'm currently a VB.NET guy and I need to create a 3D interactive globe and I have no idea if VB can do this of if there is another language that makes it easier. Can anyone point me in a good direction to create an interactive globe and find a way to distribute it as software.
No, I'm going going for a google earth thing either. I am creating it for a game, and it needs to be *like* Age of Myth or something similar in the fact that it needs to be zoomable and able to be spun around with the mouse, but that's about it. Well, actually it needs drag and drop capabilities.
Any suggestions are appreciated.
Mike
Gaming at the GuildofBlades.com is the only way to really experiece the level 99 Soul-Sucking Sword!
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It is of course possible in VB.NET but extremely difficult!
The best solution would be to use Managed DirectX, there is an SDK for download on the MS site somewhere, (it's big, ~300MB I seem to remember) and this has samples in C# and VB.NET.
You'll need a powerful computer to run it though, I tried some of the samples and it ran quite slowly.
Another alternative is OpenGL but I don't know how this fares up, I havn't tried it.
Ed
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I looked into downloading that DirectX thing and according to April's SDK, it's only in C++ and C#? Am I missing something?
Mike
Gaming at the GuildofBlades.com is the only way to really experiece the level 99 Soul-Sucking Sword!
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Those are the languages which MS provide examples in I'm guessing but of course anything that C# can do VB.NET can do as well. It shouldn't be too difficult to understand what the C# code does since they will be using exactly the same classes.
An important fact to bear in mind is that the only major difference between C# and VB.NET is the syntax.
I know that this is a VB forum but I'd strongly recommend certainly understanding C# enough to translate it to VB.NET.
So in summary it will work with VB but probably none of the examples are provided in VB.
Something that might be helpful is #Develop which has a built in C# to VB, VB to C# (and some others like Boo) translators.
You know you're a Land Rover owner when the best route from point A to point B is through the mud.
Ed
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Hey guys, I've got a problem:
I'm using vb.net 2005 and to make sure that my program only runs one instance and retrieves the arguments specified when it has been run a second time, I used this[^] code. I converted it to vb.net 2005 and after disabling the application framework, it finally worked out. But now I've got 2 problems, when the application framework is turned off:
1. The icons in my program are ugly
2. My datagridview doesn't work properly anymore
I need to have the application framework turned off because the code I mentioned above needs a sub to start up which is only possible when the application framework has been turned off.
 I can't find a solution... Anyone able to help?
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Well guys, I found the solution to my problem and it's so easy!
First of all, turn on the application framework and check the single instance checkbox underneath in the settings. Then, add this little chuck of code to your project:
<br />
Namespace My<br />
Partial Friend Class MyApplication<br />
<br />
Private Sub MyApplication_Startup(ByVal sender As Object, ByVal e As Microsoft.VisualBasic.ApplicationServices.StartupEventArgs) Handles Me.Startup<br />
Try<br />
msgbox(e.CommandLine(0))<br />
Catch<br />
<br />
End Try<br />
End Sub<br />
<br />
Private Sub MyApplication_StartupNextInstance(ByVal sender As Object, ByVal e As Microsoft.VisualBasic.ApplicationServices.StartupNextInstanceEventArgs) Handles Me.StartupNextInstance<br />
e.BringToForeground = True<br />
Try<br />
msgbox(e.CommandLine(0))<br />
Catch<br />
<br />
End Try<br />
<br />
End Sub<br />
<br />
End Class<br />
End Namespace<br />
The sub MyApplication_Startup starts when the first instance get's run, you can insert your own chunk of code there. The other sub starts when a user tries to start a second instance of the same application. Easy, isn't it? 
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Hello All,
We are developing applications based on a off-the-shelf PCI card using the PCI 9030 controller. The PCI9030 comes with the SDK to communicate to it, which has device drivers that compile as a DLL (PLXAPI.DLL) in VC++.
However in .NET, they fail on the 'Handle' data type. The Handle datatype is declared as: typedef void *HANDLE in VC++.
However, in .NET, the closest I can find is IntPtr or Integer. Both fail. The function always considers the handle as NULL if it is an integer and causes a System.NullReference.Exception if it is an intptr. Since we have VC++ that creates the DLL, I was able to go thru the function (PLXPCIDeviceOpen) and internally the handle does not match any datatype. Where are things going wrong?
I have pasted below both the .NET function prototype and the actual code of the function from the VC++
.NET
Public Declare Function DeviceOpen Lib "PLXAPI.DLL" Alias "PlxPciDeviceOpen" (ByRef Device As PCIDevice, ByRef PCIDevHandle As IntPtr) As Integer
VC++
RETURN_CODE
PlxPciDeviceOpen(
DEVICE_LOCATION *pDevice, //Device location is bus/slot/vendorid etc
HANDLE *pHandle // verified - can find the device.
)
{
U8 VerMajor;
U8 VerMinor;
U8 VerRevision;
U32 i;
char DriverName[25];
IOCTLDATA IoBuffer;
RETURN_CODE rc;
if ((pDevice == NULL) || (pHandle == NULL))
//if ( (pDevice == NULL))
return ApiNullParam;
// Get the Serial number of the device, if not provided
if (pDevice->SerialNumber[0] == '\0')
{
i = 0;
// Search for the device matching the criteria
rc =
PlxPciDeviceFind(
pDevice,
&i
);
if (rc != ApiSuccess)
{
*pHandle = NULL;
return rc;
}
}
// If provided, the SerialNumber is sufficient to open a device
sprintf(
DriverName,
DRIVER_PATH "%s",
pDevice->SerialNumber
);
// Open the device
*pHandle =
CreateFile(
DriverName,
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
FILE_FLAG_DELETE_ON_CLOSE,
NULL
);
if (*pHandle == INVALID_HANDLE_VALUE)
{
*pHandle = NULL;
return ApiInvalidDeviceInfo;
}
// Add the handle to the device list.
if (DeviceListAdd(
*pHandle,
pDevice
) == NULL)
{
CloseHandle(
*pHandle
);
*pHandle = NULL;
return ApiInsufficientResources;
}
// Verify the driver version
PlxDriverVersion(
*pHandle,
&VerMajor,
&VerMinor,
&VerRevision
);
// Make sure the driver matches the DLL
if ((VerMajor != PLX_SDK_VERSION_MAJOR) ||
(VerMinor != PLX_SDK_VERSION_MINOR) ||
(VerRevision != PLX_SDK_VERSION_REVISION))
// Get device data from driver
IoMessage(
*pHandle,
PLX_IOCTL_DEVICE_INIT,
&IoBuffer
);
// Copy device information
*pDevice = IoBuffer.u.MgmtData.u.Device;
// msgbox put here indicates that function gets here.
return ApiSuccess;
}
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Try passing the parameter ByVal instead of ByRef. For handles, the correct datatype should be IntPtr:
Public Declare Function DeviceOpen Lib "PLXAPI.DLL" _
Alias "PlxPciDeviceOpen" ( _
ByRef Device As PCIDevice, _
ByVal PCIDevHandle As IntPtr) As Integer
If not done correctly, you might also have a problem with the PCIDevice type, whatever that is.
Dave Kreskowiak
Microsoft MVP - Visual Basic
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Thank you very much. Even with Byval, the System.nullexcepton occurs and infact I do not get a handle value at all. (With ByRef, I do get the correct handle back as an integer along with the system.nullexception.
--this is how the handle type is defined in the PLXAPI.DLL
typedef void *HANDLE; (in winnt.h)
typedef HANDLE PLX_DRIVER_HANDLE;
typedef int PLX_DRIVER_HANDLE;
--
So, I think that Handle is an integer in VB.NET?? However the structure type, as you suggested, has a problem:
The structure is defined as:
(in DLL)
typedef struct _DEVICE_LOCATION
{
U8 BusNumber;
U8 SlotNumber;
U16 DeviceId;
U16 VendorId;
U8 SerialNumber[12];
} DEVICE_LOCATION;
----------------
VB.NET Structure - my equivalent
Structure PCIDevice
Dim BusNumber As Byte
Dim SlotNumber As Byte
Dim DeviceId As Short
Dim VendorId As Short
Dim SerialNumber() As Byte
End Structure
---------
Values sent to DLL (which modifies these values and I think thats where it is crashing!!!!)
dim device as pcidevice
Dim serialno As String = "PCI9030-0"
Device.BusNumber = System.Convert.ToByte(1)
Device.SlotNumber = System.Convert.ToByte(0)
Device.VendorId = System.Convert.ToUInt16(&H10B5)
Device.DeviceId = System.Convert.ToUInt16(&H9030)
ReDim Device.SerialNumber(11)
Device.SerialNumber = serialno.ToCharArray
---------
DLL DEBUG LOG SAYS:
Dev->BusNumber = 01
Dev->SlotNumber = 00
Dev->DeviceId = 9030
Dev->VendorId = 10B5
Dev->SerialNumber =
-------
serial number field goes in blank. so it is nto translated correctly. All the rest of the values are correct. On return, the DLL tries to write to the serial number "PCI-9030-0" back to the structure in the serial number field and I that is where I think it is failing. the serial number is assinged by teh dll in this generic fashion and since there i sonly one PCI-9030 device in our setup, that number never changes.
So, somehow I have to translate the serialNumber field to teh DLL correctly and make it a datatype that the C dll can write to.
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Thanks all,
the serial number field needed to be 'Long'. and handle works as intptr, integer either.
this problem has been resolved!
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Hey,
I'm having a little problem.
In my applicaton I have a combobox that is bound to a dataset. The dataset retrieves "Users" from my database. My combobox is bound as follows:
cboIncidentHandler.DataSource = busAllUsersDS.Tables("tbl_IMS_Users")<br />
cboIncidentHandler.DisplayMember = "UserFullName"<br />
cboIncidentHandler.ValueMember = "UserId"
Now, I have some textfields I want to be filled up with other data from the dataset (like UserEmail, UserPhone, etc.).
Is there someone who can help me out with this? What is the best way to do this?
Thanks in advance!!!
G72360
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Depending on the functionality you want, this is easy enough.
On the SelectedIndexChanged (? from memory) event, get the ValueMember and do another lookup on the database that returns the fields you want based on that UserId number. You can either directly change the Text properties of your TextBox's from the record that is returned or bind the TextBox's Text properties to each field.
Dave Kreskowiak
Microsoft MVP - Visual Basic
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I am working within a VB.NET [windows forms application] /SQL Server 2000 db. When a user changes the recordset I want to be able to notify the others that reload this recordset that this record has been modified.
A colleague of mine recommended that I add a Hash value to the changed recordset. This way I can compare the hash values to see if the recordset has been modified.
Having never worked with the Hash Algorithm but after reading about it, sounds like the right plan to follow.
However, I cannot find a tutorial on working with hash values with a recordset and wondered if someone had some advice on this subject.
Any help would be greatly appreciated,
Thanks in advice & Happy Easter,
~Brad
-- modified at 14:15 Friday 14th April, 2006
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