SystemParametersInfo problem

[G`HOST]

hi
a problem in SystemParametersInfo

       

.IF ax==Button1Id
       invoke SystemParametersInfo,SPI_SETDESKWALLPAPER,NULL,ADDR Wall1,\
                                             SPIF_SENDWININICHANGE
        .ENDIF 

This thing works until the "ADDR Wall1" points to the address of the bitmap file.
But if i change it to the address of the resource identifier it does not change the wallpaper.
   
.rc file ==>>

Wall BITMAP DISCARDABLE "wallpaper.bmp"

Help
Thanks

[hutch--]

Try this.

Code Select Expand


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    include \masm32\include\masm32rt.inc
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    .data?
      value dd ?

    .data
      pImage db "c:\winnt\bridge.bmp",0

    .code

start:
   
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    call main

    exit

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main proc

    invoke SystemParametersInfo,SPI_SETDESKWALLPAPER,NULL,OFFSET pImage,NULL

    ret

main endp

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end start


[hutch--]

Here is a small working app that does a lot of what you require.

[attachment deleted by admin]

[G`HOST]

Yes the above example works. but my problem is if i change  "  pImage db "c:\winnt\bridge.bmp",0 "
to say something like this  "pImage db "abc",0  " where as "abc" is the nameID of the Bitmap described in the resource file then this thing does not work, do "SystemParameterInfo" only accept the string reffering to the address of the bmp file and not the resource identifier?

[hutch--]

You need to look at what you are doing here, the API is designed to display a disk file. The help info is this,

Sets the desktop wallpaper. The pvParam parameter must point to a null-terminated string containing the name of a bitmap file.

Generally Windows is designed to display a disk file where trying to display a resource from an EXE file is not workable as the exe file can be closed and leave Windows with an error. You will note that it also optionally sets the INI file with the bitmap name so that the OS can display it in the normal settings box.

[G`HOST]

OOPS Dont know how i missed it.
THANK YOU