I have created a simple visual component based on a Label, with no 
properties or methods added so far (using VS2005, New Control Library 
project for smart device Windows CE 5).

It builds ok, I can add it to the toolbox and use it no problem in my test 
project..
However, it will also required to call an existing DLL.

When I just add the two lines:
        [DllImport("MyTest.dll")]
        private static extern int TestFunc();

It builds ok, but the component is somehow corrupted.
The text on the label in the designer in the test project displays 
"KBDStatusLabelLib.KBDStatusLabel" not "KBDStatusLabel1" as expected.
Also, if I add a property the designer displays the the Error "The type 
'Microsoft.CompactFramework.Design.UnsafeControl' has no property
named 'MyProperty'"


The code for the label component is here:

namespace KBDStatusLabelLib
{
    public partial class KBDStatusLabel : Label
    {
        public KBDStatusLabel()
        {
            InitializeComponent();
        }
        [DllImport("MyTest.dll")]
        private static extern int TestFunc();
    }
}

Can anyone help please?

John.

John,
Marking your control with the DesktopCompatible(true) attribute will 
eliminate the Unsafe control message.  You should be able to then use the 
debugger to determine any additional issues.

Rick D.
Contractor

"John Dinning" wrote:


> I have created a simple visual component based on a Label, with no 
> properties or methods added so far (using VS2005, New Control Library 
> project for smart device Windows CE 5).
> 
> It builds ok, I can add it to the toolbox and use it no problem in my test 
> project..
> However, it will also required to call an existing DLL.
> 
> When I just add the two lines:
>         [DllImport("MyTest.dll")]
>         private static extern int TestFunc();
> 
> It builds ok, but the component is somehow corrupted.
> The text on the label in the designer in the test project displays 
> "KBDStatusLabelLib.KBDStatusLabel" not "KBDStatusLabel1" as expected.
> Also, if I add a property the designer displays the the Error "The type 
> 'Microsoft.CompactFramework.Design.UnsafeControl' has no property
> named 'MyProperty'"
> 
> 
> The code for the label component is here:
> 
> namespace KBDStatusLabelLib
> {
>     public partial class KBDStatusLabel : Label
>     {
>         public KBDStatusLabel()
>         {
>             InitializeComponent();
>         }
>         [DllImport("MyTest.dll")]
>         private static extern int TestFunc();
>     }
> }
> 
> Can anyone help please?
> 
> John.
> 
> 
> 

Rick, thank you, thank you, thank you.
A simple fix and everything is now working perfectly. That was driving me 
insane.

John.

"dbgrick"  wrote in message 
news:315C8B52-975B-4FF2-950E-DD7F30612D92@microsoft.com...

> John,
> Marking your control with the DesktopCompatible(true) attribute will
> eliminate the Unsafe control message.  You should be able to then use the
> debugger to determine any additional issues.
>
> Rick D.
> Contractor
>
> "John Dinning" wrote:
>
>> I have created a simple visual component based on a Label, with no
>> properties or methods added so far (using VS2005, New Control Library
>> project for smart device Windows CE 5).
>>
>> It builds ok, I can add it to the toolbox and use it no problem in my 
>> test
>> project..
>> However, it will also required to call an existing DLL.
>>
>> When I just add the two lines:
>>         [DllImport("MyTest.dll")]
>>         private static extern int TestFunc();
>>
>> It builds ok, but the component is somehow corrupted.
>> The text on the label in the designer in the test project displays
>> "KBDStatusLabelLib.KBDStatusLabel" not "KBDStatusLabel1" as expected.
>> Also, if I add a property the designer displays the the Error "The type
>> 'Microsoft.CompactFramework.Design.UnsafeControl' has no property
>> named 'MyProperty'"
>>
>>
>> The code for the label component is here:
>>
>> namespace KBDStatusLabelLib
>> {
>>     public partial class KBDStatusLabel : Label
>>     {
>>         public KBDStatusLabel()
>>         {
>>             InitializeComponent();
>>         }
>>         [DllImport("MyTest.dll")]
>>         private static extern int TestFunc();
>>     }
>> }
>>
>> Can anyone help please?
>>
>> John.
>>
>>
>>