[USER32_APITEST] Add test for bad 'Icon Groups' but good 'Icons' such as F1'97 (#6020)

Add test for bad 'Icon Groups' but good 'Icons' such as created
by old versions of Watcom C/C++
That icon shows fine in Windows Explorer WinXP/Win2K3,
but does not show in WinVista/Win7 anymore.
A very special corner case.

We will commit the proposed fix shortly after committing the new test.

modules/rostests/apitests/user32/PrivateExtractIcons.c

@@ -27,8 +27,9 @@ BOOL ResourceToFile(INT i, PCWSTR FileName)
 
     if (FileExists(FileName))
     {
-        skip("'%S' already exists. Exiting now\n", FileName);
+        /* We should only be using %temp% paths, so deleting here should be OK */
-        return FALSE;
+        printf("Deleting '%S' that already exists.\n", FileName);
+        DeleteFileW(FileName);
     }
 
     hRes = FindResourceW(NULL, MAKEINTRESOURCEW(i), MAKEINTRESOURCEW(RT_RCDATA));
@@ -90,6 +91,12 @@ static struct
 
     /* Icon group file containing one PNG icon and one normal icon */
     {L"%temp%\\ROS.ico", 1, 1, TRUE},
+
+    /* Executable file with bad 'Icon Group' but good 'Icons'.
+     * Windows explorer shows the program's icon correctly in WinXP/Win2K3
+     * but Windows 7 shows only a default icon. This is analogous
+     * to EXE's generated by older Watcom C/C++ versions. */
+    {L"%temp%\\cpimg2e.exe", 1, 1, TRUE},
 };
 
 static struct
@@ -100,6 +107,7 @@ static struct
 {
     {L"%temp%\\ROS.ico", IDR_ICONS_PNG},
     {L"%temp%\\sysicon.ico", IDR_ICONS_NORMAL},
+    {L"%temp%\\cpimg2e.exe", IDR_EXE_NORMAL}
 };
 
 START_TEST(PrivateExtractIcons)

modules/rostests/apitests/user32/resource.h

@@ -3,3 +3,4 @@
 
 #define IDR_ICONS_PNG 2000
 #define IDR_ICONS_NORMAL 2001
+#define IDR_EXE_NORMAL 2002

modules/rostests/apitests/user32/user32_apitest.rc

@@ -10,6 +10,7 @@ TESTCURSOR CURSOR "test.cur"
 
 IDR_ICONS_PNG RCDATA "ROS.ico"
 IDR_ICONS_NORMAL RCDATA "sysicon.ico"
+IDR_EXE_NORMAL RCDATA "cpimg2e.exe"
 
 TESTDIALOG DIALOG 0,0, 200,200
 CLASS "TestDialogClass"