user32: Implement PrintWindow.
diff --git a/dlls/user32/painting.c b/dlls/user32/painting.c
index 4af522d..883b0c1 100644
--- a/dlls/user32/painting.c
+++ b/dlls/user32/painting.c
@@ -1549,3 +1549,18 @@
 {
     return USER_Driver->pScrollDC( hdc, dx, dy, lprcScroll, lprcClip, hrgnUpdate, lprcUpdate );
 }
+
+/************************************************************************
+ *		PrintWindow (USER32.@)
+ *
+ */
+BOOL WINAPI PrintWindow(HWND hwnd, HDC hdcBlt, UINT nFlags)
+{
+    UINT flags = PRF_CHILDREN | PRF_ERASEBKGND | PRF_OWNED | PRF_CLIENT;
+    if(!(nFlags & PW_CLIENTONLY))
+    {
+        flags |= PRF_NONCLIENT;
+    }
+    SendMessageW(hwnd, WM_PRINT, (WPARAM)hdcBlt, flags);
+    return TRUE;
+}
diff --git a/dlls/user32/user32.spec b/dlls/user32/user32.spec
index 326aedb..8cdc24c 100644
--- a/dlls/user32/user32.spec
+++ b/dlls/user32/user32.spec
@@ -533,7 +533,7 @@
 @ stdcall PostQuitMessage(long)
 @ stdcall PostThreadMessageA(long long long long)
 @ stdcall PostThreadMessageW(long long long long)
-# @ stub PrintWindow
+@ stdcall PrintWindow(long long long)
 @ stdcall PrivateExtractIconExA(str long ptr ptr long)
 @ stdcall PrivateExtractIconExW(wstr long ptr ptr long)
 @ stdcall PrivateExtractIconsA (str long long long ptr ptr long long)
diff --git a/include/winuser.h b/include/winuser.h
index e6b4741..91fca34 100644
--- a/include/winuser.h
+++ b/include/winuser.h
@@ -1493,6 +1493,9 @@
 #define ENUM_CURRENT_SETTINGS  ((DWORD) -1)
 #define ENUM_REGISTRY_SETTINGS ((DWORD) -2)
 
+/* Used for PrintWindow */
+#define PW_CLIENTONLY   0x00000001
+
 /****** Window classes ******/
 
 typedef struct tagCREATESTRUCTA