VB Controls, How to Determine Color Depth?

How to Determine Color Depth?

Author	Message
Matthew J. Ricciard #1 / 3	How to Determine Color Depth? --------------FFBF705A7B983F52C0767E47 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit I am currently developing a Visual Basic 5 application that will be used on both Windows 95 and NT computers. The application contains several large BMP images. Two different versions of each image are available (a 256-color version and a 24-bit color version). If the color depth of the user's display is less than 16-bit color, I would like to display the 256-color version. Otherwise, the 24-bit color version should be displayed. How can I test to determine the display color depth on a user's computer? Is there an API call for doing this? Thanks, Matthew J. Ricciardi MicroServices --------------FFBF705A7B983F52C0767E47 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit <HTML> I am currently developing a Visual Basic 5 application that will be used on both Windows 95 and NT computers.  The application contains several large BMP images.  Two different versions of each image are available (a 256-color version and a 24-bit color version).  If the color depth of the user's display is less than 16-bit color, I would like to display the 256-color version.  Otherwise, the 24-bit color version should be displayed.  How can I test to determine the display color depth on a user's computer?  Is there an API call for doing this? <P>Thanks, <P>Matthew J. Ricciardi <BR>MicroServices --------------FFBF705A7B983F52C0767E47--
Wed, 19 Apr 2000 03:00:00 GMT

David Lownd #2 / 3	How to Determine Color Depth? Quote: >How can I test to determine the display color depth on a >user's computer? Is there an API call for doing this? Yes there is Matthew. This is C++, but you should be able to translate this to VB quite easily: HDC hDC = ::GetDC( NULL ); const int Colours = GetDeviceCaps( hDC, BITSPIXEL ); The returned value is the number of bits of colour, so 4 is 16 colours, 8 is 256, 16 is 64K, etc. Dave ---- Address is altered to discourage junk mail. Remove ".---" for the real address.
Thu, 20 Apr 2000 03:00:00 GMT

dfrom.. #3 / 3	How to Determine Color Depth? Try this one --------------------------------- Const BITSPIXEL = 12 ' Number of bits per pixel Private Declare Function GetDeviceCaps Lib "gdi32" (ByVal hdc As Long, ByVal nIndex As Long) As Long Private Sub Form_Load() MsgBox GetDeviceCaps(hdc, BITSPIXEL) End Sub ------------------------------- On Sat, 01 Nov 1997 00:26:01 -0500, "Matthew J. Ricciardi" Quote: >I am currently developing a Visual Basic 5 application that will be used >on both Windows 95 and NT computers. The application contains several >large BMP images. Two different versions of each image are available (a >256-color version and a 24-bit color version). If the color depth of >the user's display is less than 16-bit color, I would like to display >the 256-color version. Otherwise, the 24-bit color version should be >displayed. How can I test to determine the display color depth on a >user's computer? Is there an API call for doing this? >Thanks, >Matthew J. Ricciardi >MicroServices
Fri, 21 Apr 2000 03:00:00 GMT

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