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I like to blog about current software design and development projects, as well as general everyday news and events. I'm passionate about what I do and you can follow my personal journey through my blog. I'm constantly on the lookout for new development techniques and technologies to keep on top of the changing market, so if I do miss anything feel free to leave me a comment.

Archive for December, 2008

C#: PayPal Donate Button

Sunday, December 14th, 2008

If you have a PayPal account and would like to add a donate button to your application you can use the following code.

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private void btnDonate_Click(object sender, System.EventArgs e)
{
    string url = "";
 
    string business     = "my@paypalemail.com";  // your paypal email
    string description  = "Donation";            // '%20' represents a space. remember HTML!
    string country      = "AU";                  // AU, US, etc.
    string currency     = "AUD";                 // AUD, USD, etc.
 
    url += "https://www.paypal.com/cgi-bin/webscr" +
        "?cmd=" + "_donations" +
        "&business=" + business +
        "&lc=" + country +
        "&item_name=" + description +
        "&currency_code=" + currency +
        "&bn=" + "PP%2dDonationsBF";
 
    System.Diagnostics.Process.Start(url);
}

Windows Forms with Rounded Corners

Monday, December 8th, 2008

Have you ever found yourself developing a custom user interface and needed rounded corners which work on different Windows Operating Systems?

If you are using Windows Vista this is easily achieved by using a rounded PNG image with transparent corners and setting the transparency property. This however does not work on systems such as Windows XP.

The following C# code can be used to ensure you have rounded corners on a number of Windows Operating Systems.

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[DllImport("Gdi32.dll", EntryPoint = "CreateRoundRectRgn")]
private static extern IntPtr CreateRoundRectRgn
(
    int nLeftRect,      // x-coordinate of upper-left corner
    int nTopRect,       // y-coordinate of upper-left corner
    int nRightRect,     // x-coordinate of lower-right corner
    int nBottomRect,    // y-coordinate of lower-right corner
    int nWidthEllipse,  // height of ellipse
    int nHeightEllipse  // width of ellipse
);
 
// Set your own values
Region = System.Drawing.Region.FromHrgn(CreateRoundRectRgn(1, 1, 10, 10 16, 16));