How do you send a windows message?

2 Jun 2006 3:20 AM

bern11

How do you send a windows message in the .net framework? Creating
messages is easy, so is intercepting messages, but I cannot find a .net
equivalent to the windows api sendmessage() function.

2 Jun 2006 3:22 AM

Greg Young

[DllImport("user32.dll")]
          public static extern int SendMessage(
               int hWnd,      // handle to destination window
               uint Msg,       // message
               int wParam, // first message parameter
               int lParam   // second message parameter
               );

Cheers,

Greg Young
MVP - C#
http://geekswithblogs.net/gyoung

Show quote

"bern11" <ber***@yahoo.com> wrote in message
news:LZWdnWj8dL7_M-LZnZ2dneKdnZydnZ2d@comcast.com...
> How do you send a windows message in the .net framework? Creating
> messages is easy, so is intercepting messages, but I cannot find a .net
> equivalent to the windows api sendmessage() function.

3 Jun 2006 12:53 AM

bern11

Well, yeah. I meant how do you do it within the .Net framework? What
is the point of having a Message class if you can't Send them?

I'm going to try one last gimmick I thought of, then I'm off to
#include <Windows.h> world....

Greg Young wrote:
Show quote

> [DllImport("user32.dll")]
>           public static extern int SendMessage(
>                int hWnd,      // handle to destination window
>                uint Msg,       // message
>                int wParam, // first message parameter
>                int lParam   // second message parameter
>                );
>
> Cheers,
>
> Greg Young
> MVP - C#
> http://geekswithblogs.net/gyoung
>
> "bern11" <ber***@yahoo.com> wrote in message
> news:LZWdnWj8dL7_M-LZnZ2dneKdnZydnZ2d@comcast.com...
>
>>How do you send a windows message in the .net framework? Creating
>>messages is easy, so is intercepting messages, but I cannot find a .net
>>equivalent to the windows api sendmessage() function.
>
>
>

3 Jun 2006 2:55 AM

bern11

I isolated the code that opened a second form out of the header and
into the .cpp file. That way the main form header didn't have to
include the 2nd form header, so I could then include the main form
header in the 2nd form header and declare a pointer as a member, which I
then set the 'this' pointer to, and then accessed the main form callback
through the pointer.

    It's not 1/2 a confusing as it sounds:

in MainForm.cpp:
    #include NewForm.h

    NewForm^ form2 = gcnew NewForm;
    form2->mainFormPtr = this;
    form2->ShowDialog();

in NewForm.h
    #include MainForm.h;
    ...
    Proj::MainForm^ mainFormPtr;

    mainFormPtr->ExecMemberFunction();

It was HeaderA including HeaderB which included HeaderA causing the
problem....

bern11 wrote:
Show quote

>
>     Well, yeah. I meant how do you do it within the .Net framework?
> What is the point of having a Message class if you can't Send them?
>
>     I'm going to try one last gimmick I thought of, then I'm off to
> #include <Windows.h> world....
>
> Greg Young wrote:
>
>> [DllImport("user32.dll")]
>>           public static extern int SendMessage(
>>                int hWnd,      // handle to destination window
>>                uint Msg,       // message
>>                int wParam, // first message parameter
>>                int lParam   // second message parameter
>>                );
>>
>> Cheers,
>>
>> Greg Young
>> MVP - C#
>> http://geekswithblogs.net/gyoung
>>
>> "bern11" <ber***@yahoo.com> wrote in message
>> news:LZWdnWj8dL7_M-LZnZ2dneKdnZydnZ2d@comcast.com...
>>
>>> How do you send a windows message in the .net framework? Creating
>>> messages is easy, so is intercepting messages, but I cannot find a
>>> .net equivalent to the windows api sendmessage() function.
>>
>>
>>
>>

2 Jun 2006 12:53 PM

William Sullivan

Check out pinvoke.net; they have several different versions and some good
info on the sendmessage function.

Show quote

"bern11" wrote:

> How do you send a windows message in the .net framework? Creating
> messages is easy, so is intercepting messages, but I cannot find a .net
> equivalent to the windows api sendmessage() function.
>