SendMessage WM_SYSCOMMAND fails to minimize a window?!

Question

2.00/5 (1 vote)

See more:

, +

I have the following code snippet that fails to minimize the window! the only difference is the FormBorderStyle is set to none, howevere changing this member has no effect!

C#

[DllImport("User32.DLL")]
public static extern int SendMessage(IntPtr hWnd, UInt32 Msg, Int32 wParam, Int32 lParam);
public const Int32 WM_SYSCOMMAND = 0x112;
public const Int32 SC_MINIMIZE = 0xF020;

    /*invoked from a control added in the form*/
    SendMessage(FindForm().Handle, WM_SYSCOMMAND, SC_MINIMIZE, 0);

Any suggestions would be appreciated.

Thanks,
Vallarasu S.

Posted 17-Nov-11 19:06pm

VallarasuS

Add a Solution

Comments

Sergey Alexandrovich Kryukov 18-Nov-11 14:40pm

Why using handle at all?!
--SA

VallarasuS 19-Nov-11 3:01am

In the user view it may sound unnecessary, but for the needs of creating a custom window this is the preferred way!

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sergey Alexandrovich Kryukov · Answer 1 · 2011-11-18T08:40:00

Using raw Windows messages in Forms application is really bad thing. Do you know that accurately written Forms application will run not on just Windows, but on many platforms without recompilation (under Mono)? A single use of HWMD will spoil this wonderful feature immediately and compromise potential compatibility with future platforms. Avoid it by all means!

Pure .NET solutions are nearly always possible. Do this:

C#

myForm.WindowState = WindowState.Minimized;

or, if you do it in the same class,

C#

this.WindowState = WindowState.Minimized;

—SA