如何用C语言结合WinAPI移动Windows桌面图标？

我参考了两个Stack Overflow线程：

• How to programmatically move icons' location from Windows Desktop?
• How can I programmatically manipulate Windows desktop icon locations?

根据这些线程的提示，桌面本质是ListView控件，我尝试直接向桌面HWND发送LVM_SETITEMPOSITION消息，代码如下：

#include <windows.h>
#include <stdio.h>
#include <CommCtrl.h>

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
    HWND MYHWND = NULL;
    MYHWND = GetDesktopWindow();
    SendMessage(MYHWND, LVM_SETITEMPOSITION, 2, MAKELPARAM(100, 100));
    return 1;
}

但这段代码并未生效。于是我又尝试将相关C++代码转为C语言版本，代码如下：

#include <windows.h>
#include <stdio.h>
#include <CommCtrl.h>

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
    HWND desktopHandle = NULL;
    desktopHandle = FindWindowEx(NULL, NULL, "Progman", "Program Manager");
    desktopHandle = FindWindowEx(desktopHandle, NULL, "SHELLDLL_DefView", NULL);
    desktopHandle = FindWindowEx(desktopHandle, NULL, "SysListView32", "FolderView");
    SendMessage(desktopHandle, LVM_SETITEMPOSITION, 2, MAKELPARAM(500, 500));
    return 1;
}

但这段代码仍然无法正常工作，希望有人能帮忙排查问题所在，谢谢！

内容的提问来源于stack exchange，提问作者bugger