VB/WinAPI/Graphics, Getting the palette color of a system color

Getting the palette color of a system color

Author	Message
Georg #1 / 4	Getting the palette color of a system color Hi, guys, I want to get a system color using the GetSysColor API call, which returns a long. The problem is this: I don't want to set some other control.BackColor to the long that I get from GetSysColor, I want to display it in hex, like this: &H00FFFFFF&, just like VB does when displaying the .BackColor on a VB control property sheet. How on Earth do you convert a long to a string representation in hex? Please don't say to convert the long to hex mathematically, because I have tried that, and it does not appear to work. The color that you get back from Windows does not represent the mathematical value of a long, but rather the bit pattern in the three lowest bytes - FF FF FF, or 256 possible values each for red, green, and blue. What I am thinking about doing is either using the CopyMem API call to overlay a string with the long and then parsing out the string byte by byte. I also am considering writing a C DLL that I can call to do this, but I don't want to do this unless there is no other way, because of code maintenance issues. Does anyone have an opinion about the best way to do this?
Sun, 30 Apr 2000 03:00:00 GMT

Michael Cod #2 / 4	Getting the palette color of a system color Quote: > How on Earth do you convert a long to a string representation in hex? > Please don't say to convert the long to hex mathematically, because I have > tried that, and it does not appear to work. The color that you get back > from Windows does not represent the mathematical value of a long, but > rather the bit pattern in the three lowest bytes - FF FF FF, or 256 > possible values each for red, green, and blue. I tried this on my system, and just setting the .BackColor property to the long returned from GetSysColor worked ok: Let's say that the sys color is 8421376 (The standard green background rgb value) label1.BackColor = 8421376 but if you do want to use the hex value then you can do this: label1.BackColor = "&h" & hex(8421376) HTH -- Michael Cody remove the "spam" from the address Quote: > How on Earth do you convert a long to a string representation in hex? > Please don't say to convert the long to hex mathematically, because I have > tried that, and it does not appear to work. The color that you get back > from Windows does not represent the mathematical value of a long, but > rather the bit pattern in the three lowest bytes - FF FF FF, or 256 > possible values each for red, green, and blue.
Sun, 30 Apr 2000 03:00:00 GMT

Pete Barre #3 / 4	Getting the palette color of a system color Quote: >Hi, guys, I want to get a system color using the GetSysColor API call, >which returns a long. >The problem is this: I don't want to set some other control.BackColor to >the long that I get from GetSysColor, I want to display it in hex, like >this: &H00FFFFFF&, just like VB does when displaying the .BackColor on a VB >control property sheet. >How on Earth do you convert a long to a string representation in hex? >Please don't say to convert the long to hex mathematically, because I have >tried that, and it does not appear to work. The color that you get back >from Windows does not represent the mathematical value of a long, but >rather the bit pattern in the three lowest bytes - FF FF FF, or 256 >possible values each for red, green, and blue. >What I am thinking about doing is either using the CopyMem API call to >overlay a string with the long and then parsing out the string byte by >byte. I also am considering writing a C DLL that I can call to do this, >but I don't want to do this unless there is no other way, because of code >maintenance issues. >Does anyone have an opinion about the best way to do this? I use wsprintf. I know you can call API functions from VB, but I don't know where you'd find this - possibly KERNEL or USER. Pete Barrett
Mon, 01 May 2000 03:00:00 GMT

George Copelan #4 / 4	Getting the palette color of a system color Absolutely! This works perfectly, thanks. - - - - - - - - - - - - - - - - - - - - - - - - - - - - George Copeland - Vectrix Corporation, Publishers of EdgeworX - http://www.vectrix.com/edgehome.htm Quote: > I tried this on my system, and just setting the .BackColor property to the > long returned from GetSysColor worked ok: > Let's say that the sys color is 8421376 (The standard green background rgb > value) > label1.BackColor = 8421376 > but if you do want to use the hex value then you can do this: > label1.BackColor = "&h" & hex(8421376)
Wed, 03 May 2000 03:00:00 GMT

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