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POProblem clearing Listview Header image on Vista
 

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  1. POProblem clearing Listview Header image on Vista
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    <p>I'm having a problem on Vista with the Listview control, in particular setting custom icons on the header. Normally under XP or any of the previous version of Windows, if I added an icon (in C++), I could do so with the following:</p> <pre><code>HeaderItem.mask = HDI_FORMAT | HDI_IMAGE; Header_GetItem(HeaderHWND, Column, &amp;HeaderItem); TurnOn(HeaderItem.fmt, HDF_IMAGE); HeaderItem.iImage = Image; if (Header_SetItem(HeaderHWND, Column, &amp;HeaderItem) == 0) printf("Failed to set header [%d:%.8X]\n", GetLastError(), GetLastError()); </code></pre> <p>and then to remove the image, on a particular column, I could use the same process but instead of turning on the HDF_IMAGE bit, you just turn it off.</p> <p>On Vista, however, when I turn it off it doesn't seem to actually be accepting the change. So, for instance, when I start my fmt is:</p> <p>0x4000 (or basically HDF_STRING)</p> <p>I turn on the icon, and it becomes:</p> <p>0x5800 (or basically HDF_STRING | HDF_IMAGE | HDF_BITMAP_ON_RIGHT)</p> <p>I then turn it off again, but the result is:</p> <p>0x4800 (or basically HDF_STRING | HDF_IMAGE)</p> <p>I've checked, and I setting it to HDF_STRING only, but once HDF_IMAGE is set, it seems to be impossible to remove. Header_SetImage doesn't return any errors, so I'm at a loss as far as what to do. I've also tried removing the Imagelist from the control, but it still leaves the space as if there still was an image there.</p> <p>At the end of the day I need to be able to add and remove icons from the header, and when they are removed I need all the header space available again (as they were before any were displayed. Any help would be greatly appreciated - thanks in advance!</p>
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