Databases
StackOverflow2013
Postsdbo
POMy code which uses UpdateLayeredWindow doesn't work
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POMy code which uses UpdateLayeredWindow doesn't work
    primarykey
    data
    text
    <p>I attampted to draw a irregular window with the UpdateLayeredWindow(), in msvc2008, xp sp3.<br> Here is part of my code:</p> <pre><code>//Add something(CreateWindowEx()): hwndCyauWnd = CreateWindowEx( /*WS_EX_TOOLWINDOW |*/ WS_EX_LEFT | WS_EX_LTRREADING | WS_EX_LAYERED, lpwsCyauClassName, lpwsCyauWndName, WS_CLIPSIBLINGS | WS_POPUP, GetSystemMetrics(SM_CXSCREEN)-320, GetSystemMetrics(SM_CYSCREEN)-232, 320, 200, NULL, NULL, hInstance, NULL); //Skip Lines HDC hdcCyauWnd = GetDC(hwndCyauWnd); HDC hdcBuffer = CreateCompatibleDC(hdcCyauWnd); //HBITMAP hbmCyau = CreateCompatibleBitmap(hdcBuffer,120, 93); //SelectObject(hdcBuffer, hbmCyau); POINT ptZero = {0, 0}; POINT ptDrawPos = {0, 0}; RECT rctCyauWnd; GetWindowRect(hwndCyauWnd, &amp;rctCyauWnd); SIZE szCyauWnd={rctCyauWnd.right - rctCyauWnd.left, rctCyauWnd.bottom - rctCyauWnd.top}; BLENDFUNCTION blendPixelFunction = { AC_SRC_OVER, 0, 100, AC_SRC_ALPHA}; Graphics gphCyauWnd(hdcBuffer); Image imgCyau(L"surface0000.png"); gphCyauWnd.DrawImage(&amp;imgCyau, 0, 0, 125, 93); UpdateLayeredWindow(hwndCyauWnd, hdcCyauWnd, &amp;ptZero, &amp;szCyauWnd, hdcBuffer, &amp;ptZero, 0, //RGB(255, 255, 255), &amp;blendPixelFunction, ULW_ALPHA); while (GetMessage(&amp;msg, NULL, 0, 0)) { TranslateMessage(&amp;msg); DispatchMessage(&amp;msg); } return msg.wParam; </code></pre> <p>I have tried several method to use this function, but all failed, NOTHING APPEAR on the screen.<br> Could anybody tell me what happens and how to slove it? </p> <p>Add:<br> Whole source file have been upload to <a href="https://skydrive.live.com/redir.aspx?cid=ad741b27120b92fd&amp;resid=AD741B27120B92FD!195&amp;parid=AD741B27120B92FD!160&amp;authkey=!AK-l6sOqayj5Q_A" rel="nofollow">my skydrive</a>, anyone can edit, much appreciation! (I have become a poor underdog now...)</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. UScuter44
    1. UScuter44
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POMy code which uses UpdateLayeredWindow doesn't work
      1. This table or related slice is empty.
      1. VTUpMod
    1. COPer [the documentation](http://msdn.microsoft.com/en-us/library/windows/desktop/ms633556.aspx), the window you pass as the first parameter to the `UpdateLayeredWindow` function must have the `WS_EX_LAYERED` style specified when it is created with the `CreateWindowEx` function. And on versions of Windows prior to 8, that window must be a top-level window (Windows 8 supports the `WS_EX_LAYERED` style for top-level windows *and* child windows.)
      singulars
      1. POMy code which uses UpdateLayeredWindow doesn't work
      1. USCody Gray
    2. CO@CodyGray Oh, sorry. I left behind some lines. hwndCyauWnd already have WS_ES_LAYERED style before the block. So it should work, but it didn't. That is why I am confused.
      singulars
      1. POMy code which uses UpdateLayeredWindow doesn't work
      1. UScuter44
    3. COHmm, do be sure to edit the question and add in those lines that you left out. Particularly the ones where you call `CreateWindowEx` to create the window. Questions like this one (where you're asking for someone to help you debug your code) should really include a small, self-contained demo project that we can run ourselves.
      singulars
      1. POMy code which uses UpdateLayeredWindow doesn't work
      1. USCody Gray
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload